UMLS Knowledge Sources: File Downloads

Download Notes:

Download and extract all UMLS data and zip files to the same directory.
Read the README file before downloading, which includes information on installing the UMLS Knowledge Sources and highlights changes for this release.
Additional documentation is available at http://www.nlm.nih.gov/research/umls.
At 1M bits/second, it will take approximately 4 hours to download the complete UMLS release. Downloading is advised only if you have a very fast Internet connection.
This release is also available on DVD. To order, send an e-mail to NLM Customer Service. Be sure to include your license code.
Each UMLS release includes MetamorphoSys, required to install Knowledge Sources files, and to create, search and browse customized Metathesaurus subsets. MetamorphoSys requires a minimum of 30 GB of free hard disk and takes 2-10 hours to run on a range of platforms tested. The actual time will depend on your configuration, hardware and operating system platforms.