HELP

1. Steps for a basic search

In the ALL RECORDS search blank, type words that describe what you are looking for (it doesn't matter if you use upper or lower case letters and most punctuation is ignored)

• If only one record matches your search words, you will be presented with a single catalog record display.
• If no matches are found, you will get a message: "No records were found for the search" (see tips in Not finding enough? for ways to retrieve more results)
• If the words are found in more than one catalog record, you will be presented with a Brief Records Display--a list of brief descriptions of individual images and/or groups of images. The system will display up to 10,000 records, unless you have set the "Display up to" blank to retrieve a larger or smaller quantity of records.

Brief Records Display

• you can view all the cataloging information for a particular listing by selecting its linked title
• or you can view the list in a graphic form by selecting the Preview Images button--this is a fast way to see which records include digital images and what they look like (but see this tip: Don't ignore the Group Record links and links within records)

Preview Images display

• select a linked title to see the associated catalog record.
• select the thumbnail image to see a larger image (if you are searching from outside the Library of Congress, availability of this option will depend on whether the image has been cleared for offsite display; if a larger image can display offsite, your browser will show the "hand" symbol, or however it indicates available links).
• select to view the list of brief descriptions again
  

Single catalog record display

The catalog record gives information about the item or group. Also:

• If an item has been digitized, the catalog record includes a small (thumbnail) image.
• If the item has been cleared for display outside the Library of Congress, you can select the thumbnail to see a larger image display.
• All records include a link to explain how to obtain copies of the material that is described in the record.
• The catalog record may also include links to associated records or images.

• Historic American Buildings Survey/Historic American Engineering Record/Historic American Landscape Survey catalog records may lead to several types of architectural documentation, which are indicated by icons at the top of the catalog record.
  

Larger image display

The larger image display, if available, includes links to higher resolution images and, sometimes, alternate versions of the image. For information about downloading images, see Downloading and Linking tips.

When you're finished viewing a record or image

• From a larger image display, use the navigation bar to return to the bibliographic information (catalog record).
  
• From a catalog record display, use the navigation bar to move forwards or backwards through the records you retrieved with your search, return to the brief records list, enter a new search, learn more about the collection the image belongs to, or start over at the main collections/search screen.
  

2. Not Finding Enough?

• Select to search ALL RECORDS at once rather than searching a single collection
• Use fewer words (many "inventory level" records include only information from a caption or caption card, so, for instance, an individual's first name may not be included or fully spelled out)
• Check spelling and spacing of search word(s)--are there alternate spellings, could two words have been combined into one (or vice versa) in image captions, have you used abbreviations that can be spelled out?
• Look through the list of collections. Is the image you are looking for something we are likely to have? (E.g., art reproductions, recent news photos, and illustrations of ancient peoples are not strengths of our collections.)
• In search screens for individual collections:
  • try selecting from the lists of terms by selecting the "browse" links
  • if a "Preview" option is available, sample the preview and select an image that is close to what you are looking for. Then try searching the words used to describe the record or image. Or look at any catalog record to see what kind of information can be searched for in the collection.
• See additional search tips in the Searching Concepts and Tips section.

3. Finding Too Much?

• Set search pull-down boxes (underneath the search box) to:
  "match all" or a phrase and to do an "exact match" on the words.
  
• Look through the list of collections at: http://lcweb2.loc.gov/pp/pphome.html. Are there ones that are particularly relevant?
• In individual collections, try selecting from the lists of terms in the browse lists:
  

4. Searching by time period and place

Time period

At present, there is no simple, precise way to search for a date or time period.

• You can search for the year in which an image or group of images was produced by typing @field(DATE+desired year). You cannot combine this string with other search terms, unfortunately.
  Example:
  
  Note: Catalog records often use estimated dates or multiple dates that are expressed as a range of years. If your year falls within that range, it will not be retrieved. Try neighboring years that end in 5 or 0, e.g., 1750, 1755
• Subject headings often include a chronological component that is expressed in decades. For instance, if the item was produced or depicts something in 1844, the subject subdivision will be 1840-1850. So you might try searching for decades that would be relevant.
• You can do an "all text" search for a year or a span of years. But the appearance of the date or the particular string of numbers anywhere in the record (other than a number field) will cause the record to be retrieved, so you may get records for items whose artist was born in that year, or records that include a four digit address.

Place

It is best to try both specific place names and the names of the larger geographic juridictions when searching geographically.

• Some catalog records include a hierarchy of the places represented by an image or set of images, going from the larger geographic unit to the smaller. Example: Canada--British Columbia--Columbia Mountains.
• In other cases, only the specific place is mentioned, sometimes with an abbreviation for the larger geographic jurisdiction. Example: Los Angeles (Calif.)

5. Searching by number (digital id., reproduction, call numbers)

You can only search for digital id. numbers, reproduction numbers, call numbers (and, in some collections, copyright numbers and "other" classification numbers) by using:

• the "number search" selection in the pull-down menu for the All Records search
  
• a "Searching Numbers" screen within particular collections
  

What are these different numbers?

• Call numbers: A string of letters and numbers used to locate the original material filed at the Library of Congress.
• Reproduction numbers: An alpha-numeric code that identifies existing black-and-white and color negatives, slides, or transparencies or high quality digital scans from which prints, transparencies, and other reproductions can be ordered.
• Digital id. numbers: This alpha-numeric code indicates the unique identifier for the digital image displaying with the catalog record.

All of these types of numbers are formulated in different ways in different collections. For instance, in some collections, negative numbers include "leading zeros" (e.g., LC-USF34-007820). If you are in doubt about how the number may be formulated, select the "Searching Numbers" screen, which gives examples of how the numbers are formulated for any given collection.

Searching by Digital Id.

You may start with different information, depending upon whether you got the number by looking at a catalog record or by copying down the number when displaying the image. Some general rules of thumb for searching digital id. numbers are:

If you see in a catalog record:
DIGITAL ID: ([format]) [letters] [numbers] http://hdl.loc.gov/loc.pnp/[letters].[numbers]
You type: [letters] [number]

Example:
You see: (b&w film copy neg.) cph 3c07395 http://hdl.loc.gov/loc.pnp/cph.3c07395
You type: cph 3c07395

---

If you're starting with a digital file name that ends with: r.jpg, v.jpg, or u.tif
You type: The letter/number string after the final slash, dropping the "r.jpg," "v.jpg," or "u.tif" part.
Note: A known problem with the system is that it sometimes gives an error message when retrieving a single string of numbers. The remedy is to keep trying or to find the letter code after "/pnp/" and include that in your search.

Example:
You see: http://memory.loc.gov/service/pnp/cph/3c00000/3c07000/3c07300/3c07395v.jpg
You type: 3c07395 (or, more reliably, cph 3c07395)

---

Occasionally, a digital file is part of a set of images that do not have individual catalog records, and you need to retrieve the record for the whole set and then page through the images to locate the item.

If you see: A digital id. with two sets of numbers at the end, separated by a hyphen
You type: The letters and numbers, dropping the set of numbers after the final hyphen

Example:
You see: LC-DIG-ppmsca-09666-0002 (digital file from L9-68-3619-N, frame 3A)
You type: LC-DIG-ppmsca-09666

If you see: A digital file name that ends with two sets of numbers, seemingly not numerically related (or you simply try searching the final set of numbers, dropping the letters as instructed above, and get no result)
You type: The second to the last set of numbers (or, more reliably, the second to the last set of numbers, and the letters appearing after "/pnp/")

Example:
You see: http://memory.loc.gov/pnp/ppmsca/09600/09666/0002v.jpg
You type: 09666 (or ppmsca 09666)

6. Don't ignore "Group Record" links and links within records!

Some group records contain links to images and/or links to further information within them.

Examples:

• HABS/HAER/HALS records contain links to different types of documentation:

  

• Records for groups of images (LOTs or ADE UNITs); all or some of the items may have been cataloged and digitized as people requested reproductions:

  

  leads to:

  

• Some groups of images have been digitized but not individually cataloged:

  

• FSA/OWI records have links that allow you to see related images that do not have titles and are not indexed by photographer, because they were not captioned or printed at the time the images were produced.

  

  leads to:

  

Some item records that have very brief information may be fleshed out by selecting the "Find any corresponding online LOT(group) record" link, in order to find out about the group the item comes from. Not all items have a corresponding group record.

7. Downloading and Linking Tips

Downloading Image Files

The Prints & Photographs Online Catalog includes images in the following formats:

• gif - generally small "thumbnails" used for "previewing" images; a gif image displays at the top of its associated catalog record and, in some cases, it is the only image that will display to those searching outside the Library of Congress because of rights considerations (extension on the file name is .gif). The resolution is generally about 150x150 pixels.
  
• jpeg - generally a larger image that displays in a separate screen from the catalog record; sometimes two types of jpeg files are available--one for reference viewing and one at a higher resolution (extension on the file name is .jpg).
• tiff- generally the highest resolution file available in PPOC, viewed or downloaded via a link on the screen where the reference jpeg displays (extension on the file name is .tif).
  

A complete description of these formats can be found in a document on the American Memory web site: How to View Prints and Photographs.

In cases where the rights to an image have not been evaluated or are known to be restricted, .jpg and .tif images will not display to those searching outside of the Library of Congress.

We occasionally get reports that individuals have difficulty saving .tif files, even when the link is visible to them. One possible explanation for this is that the file is large (many .tif files exceed 10 megatbytes, and some are as large as 190 megabytes). Particularly when using a dial-up connection, it can take considerable time to open or save such a file. It is best, in these instances, to try to save the file without first opening it. Browsers and helper applications vary in how they present downloading options and steps. The following are the general steps for saving files.

To save images:

1. Place your mouse over the image of the desired jpeg or tiff link.
2. Click the right mouse button (PC) or depress and hold the single button of the mouse (Macintosh).
3. A menu will appear.
   • Select Save image as or Save Picture as if you moused over an image.
   • Select Save target as or Save link as if you moused over a link.
4. A box will appear in which you indicate your desired name of the image file and where you wish it to be saved. Note: Web images often have non-intuitive file names (ex. 1a34653u.tif)-you may want to rename the image to something you will understand later (e.g., railroad.jpg).

Image Resolution

The quality of the digital images varies greatly, depending upon when and from what source the digitizing was done. In general, digital files that are considered of high enough resolution for the Library's Photoduplication Service to make a quality reproduction from it include an "LC-DIG..." type of number in the reproduction number field.

Gauging the "dots per inch" (dpi) of an image file

Images found in the Prints & Photographs Online Catalog vary considerably in resolution. The size of the original or copy that was scanned also varies, making it difficult to state the "dpi" of any given file.

When using an image you have downloaded from the catalog, the "dpi" is partially determined by the size with which you intend to reproduce the image. Most image software enables you to set the desired size and then view the resulting dpi or, conversely, to set the desired dpi and see what size image can be reproduced at that level.

Here's a rough and ready way to estimate what dpi you will get based on the size of the image file: divide the pixel dimensions for the digital image by the dots per inch you wish to achieve--this will tell you what size the image will need to be.

Example:

• You have downloaded this digital image:

• Find out the dimensions of the digital image. One easy way to do this is to right-click on the image, and look at the image properties. When viewing TIFF images, you may need to select a choice such as "About..." in your viewer.

• The image properties tells you the scan is 720 x 1024 pixels.

• For a 300 dpi result, divide each pixel dimension by 300, and you'll know roughly how large the scan can be printed and be called 300 dpi.

  720 / 300 = 2
  1024 / 300 = 3
  As long as the image printed from this particular file is not much beyond 2 x 3 inches, it will be in the 300 dpi ballpark.

Linking to Particular Records

The display of PPOC catalog records is dynamic. That is, the computer assembles the display in response to your particular request. This poses a challenge for linking and bookmarking since the URL (Uniform Resource Locator or Web address) is temporary; if you bookmark one of these temporary record displays, you will not be able to reach the address later. Do not rely on any address with the word “temp” in it. For most PPOC records, you can get a permanent URL by following the steps below:

Find the URL:

• Search for the record you wish to link to.
• Look near the end of the record for the DIGITAL ID: field. If the field contains a URL with the letters "hdl" in it, use that URL as the permanent link (e.g., http://hdl.loc.gov/loc.pnp/cph.3b29086). The inclusion of the "hdl" indicates that the record has been assigned a permanent "handle" that will always bring you back to the most current version of the record.
• If the record does not have an "hdl" in it, while viewing the record, select "View" on the Web browser menu bar and in the resulting menu, select to view the "Page Source" (or "Document Source" or "Source"--depending on your browser)
  • A new window will open with the Web page's HTML formatting tags. Scroll to the bottom of the page.
  • You will see "The following URL will result in display of this document" and on the next line there will be a URL.

Copy the URL:

• Highlight the complete URL
  Example: http://hdl.loc.gov/loc.pnp/cph.3b47467
  Example: http://memory.loc.gov/cgi-bin/query/r?pp/vv:@field(NUMBER+@band(cph+3c16995))
• Copy the highlighted URL.
  
  • Windows: Press Control-C (i.e., hold down the Control key while pressing the letter C key).
  • Macintosh users: Press Command-C (i.e., hold down the Command key while pressing the letter C key).
• Close the window displaying the HTML formatting tags by clicking the CLOSE box. (An X in the upper right-hand corner of the window.)

Adding the page to Bookmarks or Favorites:

With the URL in the Location Box of the browser, you can now bookmark the Web page.

• On the browser toolbar, select Favorites (for Internet Explorer) or Bookmarks (Netscape Navigator or Mozilla). In the pull-down menu, choose Add to Favorites or Bookmark this Page.

Link the URL:

Paste the tested URL into your Web page/HTML as the link URL.

8. Frequently Asked Questions

Why aren't images displaying?

If a message at the top of the catalog record says "No digital image available," no image will display.

• Not all catalog records in the Prints & Photographs Online Catalog are accompanied by images.
• In cases where an image is known to have rights restrictions or the rights to the image have not been evaluated, only a thumbnail (gif) image will be available to searchers outside the Library of Congress.
• The Collections/Search page gives descriptions of each of the collections/categories that can be searched in the catalog and includes information regarding whether images will display inside and outside the Library of Congress.
  
• If the collection/category listing indicates that images should be displaying at your location, you may want to check to see whether graphics have been turned off on your browser. If a "broken" graphic appears, there may be a problem with the link to the image or a temporary server problem.

Why don't I find images I know the Prints & Photographs Division holds?

How do I obtain copies of material found through the catalog?

It is possible to download many images from the online catalog. See Downloading and Linking tips.

Copies of most images listed in PPOC can be ordered from the Library of Congress Photoduplication Service by by email, fax, or mail. Selecting the "How to Obtain Copies of This Item" link near the top of the catalog record will provide you with the information you would need to place an order.

Why am I having problems viewing/downloading this tiff image?

We occasionally get reports that individuals have difficulty viewing or saving tiff files, even when the link is visible to them. There are a few possible explanations for this:

1. The file is large. It may be that it is simply very slow to load; particularly when using a slower connection, it can take considerable time to open or save TIFF files, some of which exceed 100 mb.

2. It is a 16 bit file. If it is labeled "Highest Resolution TIFF Image," it is a 16 bit image; many older viewing softwares are not configured to handle 16 bit images. It is best, in these instances, to try to save the file without first opening it (see Downloading and Linking tips).

3. Some TIFF images display more successfully in one browser software than another (e.g., an image may display in Firefox that does not display in Internet Explorer). The symptom of this problem is often that, once the TIFF image loads, you just get a series of strange text charaters. Try another browser. (You are also welcome to report the problem via our Ask a Librarian service, and we'll request to have the image adjusted for use in all browsers.) [view Ask a Librarian form - please include the REPRODUCTION NUMBER or DIGITAL ID]

4. You have Quicktime software that is trying to display the TIFF image. If after waiting for a TIFF file to load, you get what looks like a piece of torn movie film, you have encountered Quicktime unsuccessfully attempting to display the TIFF file. Quicktime tries to read TIFF files, but it can't read all varieties of TIFF files, including some found on the Library of Congress web site. You will need to instruct Quicktime to stop trying to display TIFF files. Once you've done this, your TIFF software, if you have one installed, should start working. Here is how to disable Quicktime for the purpose of viewing TIFF files with a different software tool:

1. Play a Quicktime Movie with the Quicktime Player. A short one is available here: <http://memory.loc.gov/mbrs/edmp/4051.mov>.
2. At the right end of the navigation bar (below the movie window) click on the small down arrow. Click on "About Quicktime Plug-In" and make sure you have version 5 or higher. (If not go to <http://www.apple.com/quicktime/download/> before proceeding with the rest of the steps and download and install the latest version, then return to these instructions and begin again at step one.)
3. Click "OK," then click on the down arrow again
4. Select Plug-In Settings
5. Select MIME Settings
6. Double click the TIFF entries until the plus-signs there go away.
7. Now try the TIFF file again. It should work with the TIFF software on your computer, if the TIFF file format is properly "associated" with your web browser. (For a list of TIFF viewers, see: http://memory.loc.gov/ammem/help/view.html#photograph )

What size is the original image?

If the size of the original image has been recorded in the online record, it will be found in the MEDIUM field.

Many online catalog records do not include the measurements of the original item, because of the resources it takes to record this information and the uncertainties that can occur in measuring images of various types.

In some cases, a general size range can be gleaned from a filing designation given in the CALL NUMBER field. Letter designations that appear at the end of many Prints & Photographs Division call numbers for individual prints, photographs, and drawings (posters are an exception) indicate the size of the container in which the item is housed.

Sample call numbers that include container designations:
ADE 11 - Marie, no. 2 (C size)
PGA - Schulz, F.G.--Stuttgarter Bilderbogen (B size)
FP - XX - S354, no. 3 (D size)

NOTE: The size of the container only offers a general approximation of the size of items contained within the container. The size of items in the container can sometimes be substantially smaller than the dimensions of the container itself.

How do I get permission to use an image found through the catalog?

The Library of Congress can neither grant nor deny permission to use images, as it does not own the rights to most images in its holdings. The Prints & Photographs Division attempts to provide known information about the rights to images. Whether or not you can use an image is partly determined by what you intend to do with it, however, and rights to many images found in the Prints & Photographs Online Catalog have not been individually evaluated.

Finding Out About Image Rights

There are several online sources of information that may indicate the rights status of an image. Check:

• the catalog record (generally in the "Rights Information" field)
  Sample:
  

• the "How to Obtain Copies of This Item" link--"Rights and Restrictions" information appears at the bottom of those pages
  Sample:
  

• the "Rights and Restrictions Information" page on the Prints & Photographs Reading Room site

  • includes specific rights statements for particular artists, corporations, and collections
  • features a reference aid, "Copyright and Other Restrictions That Apply to Publication and Other Forms of Distribution of Images," which outlines steps for assessing rights to individual images.

9. More Help

• Searching Concepts and Tips
  • Searching All Text of Catalog Records
  • Searching Particular Parts of Catalog Records
  • Choosing from Lists of Terms Used in Catalog Records
  • Search tips
• Scope of Prints & Photographs Online Catalog
• How the Prints & Photographs Online Catalog Relates to Other LC Search Systems (American Memory, Library of Congress Online Catalog, etc.)

Searching Concepts and Tips

The Prints & Photographs Online Catalog gives you the option of searching all online records at once or confining your search to a particular collection or category.

Once you select the pool of records to search, there are three ways to search the records: text search, search particular parts of the catalog record, and choose from lists of terms used in catalog records.

• Searching All Text of Catalog Records--Searches all text in the catalog records--does not search number fields. Choose this type of search when you:
  • do not know in which fields your search words are likely to occur
  • want to combine terms that may appear in different fields (e.g., a photographer's name and a subject)
  • want to search terms that appear in NOTE fields
  • want to do a search in which recall (quantity of retrieved records) is more important than precision (relevance of retrieved records). In other words, you want to conduct an exhaustive search, rather than a highly specific one
  • want to develop a quick sample search.
  Since most researchers will want to start their searching here, the system usually defaults to this search method.

• Searching Particular Parts Of the Catalog Records--Choose this type of search when you:
  • know the fields in which your search words are likely to occur.
  • want to search an identification number (number fields are not included in the Text Search)
  • want to do a search in which precision (relevance of retrieved records) is more important than recall (quantity of retrieved records). In other words, you want to conduct a highly specific search, rather than an exhaustive one.

    The parts of the catalog records that can be searched are:

    • Subjects--This will search fields labled SUBJECTS, TOPICS, and FORMAT. Many of the subject headings and genre/format headings used in Prints & Photographs Online Catalog records are drawn from the Thesaurus for Graphic Materials, which is maintained by the Prints & Photographs Division. In some collections (e.g., American Political Prints) that do not use subject headings from these thesauri, the subject terms that have been applied appear under the TOPICS label.
    • Creators and other Associated Names--Includes names of photographers, artists, architects, builders, etc., associated with the image or the building or art work it depicts. Also sometimes includes names of donors and copyright holders. Does not include names of people depicted. Since some names are only recorded in NOTE fields, names not found through this search may be found through a Text search.
    • Titles--Many types of images do not have established titles; catalogers sometimes have to devise titles for items and groups.
    • Numbers--Includes reproduction numbers (which usually begin with LC- ), call numbers (which can include words as well as numbers), digital id. numbers, copyright registration numbers, and record identification numbers. In some cases, separate elements of the number can be searched.

  Additional information about fields used in the catalog records and cataloging conventions can be found in "About This Collection" information available with some collections.

• Choosing from a list of terms (e.g., subjects, creators/associated names, places) used in the catalog records--This will show you all of the terms that were included in a particular field or set of fields in the catalog records for the set of records you are searching. Choose this option when you:
  • aren't sure what terms may have been used for the images you are seeking
  • aren't sure how a particular name was spelled in the catalog records
  • want to get a sense of the array of subjects/creators/places covered by a particular collection
  • don't feel like typing much.

    NOTE: This option is not available in the ALL Collections/Categories search (there are too many terms to list). Collections may vary in the lists that are made available. For example, some geographically oriented collections include lists of places cited under the state or (if non-U.S.) country; collections not strongly oriented towards geography simply include geographic terms in the Subjects list, with places in the U.S cited under "United States--." Since selecting from the list of terms is the equivalent of entering a search with those terms, you may get search results that do not exactly match the terms you clicked on.

Search Tips:

• Use either capital or lowercase letters. Case does not affect the results of your search.
• Common words (e.g., AND, THE) and most marks of punctuation will not be considered in the search.
• Enter the words in the order in which they would most likely appear in the text. The order of the terms does not affect which records appear in the search results, but it does determine which records will display first (relevancy ranking).
• To make searching more precise, select "Match this exact phrase" or "Match all of these words" and select "Match words exactly" under the search term form. If, on the other hand, you want the system to generalize your search, select "Match any of these words" and tell the system to include singulars, plurals, and words with the same "stem," by selecting "Include variants (e.g., plurals)"
• On each search screen, you can set the number of records you wish the system to retrieve. The default is 10,000 records. The maximum is generally 32,000 records.
• When you are viewing a record, you can click on any "hot linked" terms (e.g., those listed under SUBJECTS or CREATOR) to retrieve a list of other records with similar terms.

Scope Of Prints & Photographs Online Catalog

• Recently created or converted catalog records. We are in the process of converting several of our card catalogs to make the materials they describe searchable online.
• Digital images for a portion of the holdings--Digital images do not appear with all catalog records. Many items have not yet been digitized. Some digitized items display only as thumbnails (gifs) to searchers outside the Library of Congress because of rights considerations.
• Various types of records and data--The Prints & Photographs Online Catalog includes a variety of types of records, depending upon the nature of the materials and the project under which computer records were made. The records vary in the kinds of information they include. Among the types of records you may see in the catalog are:
  • Guide Record--Describes an entire collection, outlining its scope, provenance, and the finding tools that provide access to images (digitized or non-digitized) in the collection.
  • Group Record--Describes a group of images that are related, usually by source or subject matter. Various kinds of call number designations may be used to designate a group of images: LOT, LOOK - Job, ADE - UNIT. Most groups of images are not available in digital form and must be viewed onsite by coming to the Prints & Photographs Reading Room and submitting a call slip. Some have additional finding aids that provide further description of images in the group.
  • Item Record--Describes an individual item, sometimes accompanied by a digital image. In some cases, every item in a collection has been described with an item record. In other cases, selected item records have been created, often for images for which copy negatives or transparencies have recently been made. Item records can vary in the amount of information supplied; some include unconfirmed information and non-standard subject headings.
  • Supplementary Textual Information--Some collections have helpful background information, bibliographies, and technical notes that may be viewed by clicking on the "About this Collection" button.

How the Prints & Photographs Online Catalog Relates To Other LC Search Systems

• American Memory--Some records and images found in the Prints & Photographs Online Catalog are also represented in American Memory, a program to make historical materials in a variety of media available to the public via Internet. Records and images for the Daguerreotypes, the Detroit Publishing Company Collection, and several other collections are available in both search systems. Not all of the Prints & Photographs Divisions cataloged holdings, however, fit into the scope of the American Memory effort and so not all are represented there. On the other hand, American Memory displays images from other units of the Library of Congress, as well as from other institutions, that are not included in the Prints and Photographs Online Catalog.
• Library of Congress Online Catalog--A growing percentage of the records in the Prints & Photographs Online Catalog can also be found in the Library of Congress Online Catalog. Digital images that accompany catalog records will generally not display in the Library of Congress Online Catalog, however. Instead, a link will take you to the record and image display in PPOC. Since some records are entered directly into the Library of Congress Online Catalog, it provides the most up-to-date information about certain pools of records (Guide records, High Demand item and group records, some Architecture, Design and Engineering records).
• Z39.50 Search ("Word Search")--The same records that are in the Library of Congress Online Catalog can also be found in the Z39.50 search system.

The Library of Congress >> Prints & Photographs Division >> Prints & Photographs Online Catalog>> Help

June 4, 2008