Vim is nothing but a clone of vi. Vim is available for many different systems, and there are several versions. Bram Moolenaar, Vim’s benevolent dictator for life, marked the occasion at the end of last year with a short note on the project’s web site:
Vim version 1.14 was the first public release of Vim, distributed on Fred Fish disk 591. The executable has the version information “Vi IMitation v1.14 (Nov 2 1991 0:36:35)”. That is exactly 25 years ago. Raise your glass to Vim!
Vim’s ancestry goes back even further. Vim, or “Vi IMproved”, was started as a clone of the venerable vi editor, which was created by Bill Joy in 1976. Vi has its own complicated lineage: vi was the visual mode of Joy’s own ex editor, which in turn can be traced back to Ken Thompson’s ed editor from Bell Labs. O’Reilly’s Learning the vi and Vim Editors has a complete family tree of the vi editors. Vim’s 25th anniversary also coincides with the official release of version 8 on September 12, 2016. Vim 8 is the first major release since the appearance of version 7 in May 2006. Even the last point release, 7.4, was released back in August 2013.