PVCS
PVCS Version Manager (originally named Polytron Version Control System) is a software package by Serena Software Inc., for version control of source code files. PVCS follows the "locking" approach to concurrency control; it has no ''Merge (version control), merge'' operator built-in (but does, nonetheless, have a separate merge command). However PVCS can also be configured to support several users simultaneously attempting to edit the file; in this case the second chronological committer will have a branch created for them so that both modifications, instead of conflicting, will appear as parallel histories for the same file. This is unlike Concurrent Versions System (CVS) and Subversion (software), Subversion where the second committer needs to first ''merge'' the changes via the ''update'' command and then resolve conflicts (when they exist) before actually committing. Originally developed by Don Kinzer and published by Polytron (software company), Polytron in 1985, through a hi ...
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Polytron (software Company)
Polytron Corp. was a software company founded in 1982 to create a line of instrumentation products for the IBM Personal Computer. It was the creator of the Polytron Version Control System (PVCS). The company was acquired by Sage Software of Rockville, Maryland in 1989, and is now part of Serena Software. Background The original company goal was to create a line of instrumentation products for, or based on, the then–recently introduced IBM personal computer. The company was founded in 1982 by Richard Kinnaird, Don Kinzer, Charlie Perkins, and Doug Root.Polytron Corp.
IT History Society online; accessed December 2013 With the exception of Root, all of them had worked at in various hardware and/or software ...
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