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Version history
Changes to the databases
For details about how the values of the fundamental constants and the bibliographic citations have changed, see version histories of the fundamental constants database and the bibliographic database.
Changes to editorial content
9 March 2007 |
The 2006 values provided, 2002 values transferred to archived tables. |
9 December 2003 |
The 2002 values provided, 1998 values transferred to archived tables. |
23 July 1999 |
The 1998 values provided, 1986 values transferred to archive page. |
17 June 1999 |
Binary prefixes added to SI Units section. |
19 October 1998 |
Minor editorial additions. Feedback and links pages updated. Links to online unit conversions introduced. |
17 February 1998 |
Site established. |
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