[TUHS] SCCS, TeamWare, BitKeeper, and Git

As I mentioned in another post, I'm writing an invited paper for an upcoming issue of IEEE Transactions on Software Engineering that will be a 50-year retrospective of my original 1975 SCCS paper ( mrochkind.com/aup/talks/SCCS-Slideshow.pdf) Can some people here review a couple of paragraphs for accuracy? *Decentralized Version Control (DVCS)* *While VCSs like CVS and Subversion were centralized and had pre-commit merging, a further advance was towards decentralization, with post-commit merging. Probably the first DVCS was Sun WorkShop TeamWare, created by Larry McVoy and announced in 1992 [sun]. It was implemented as a layer on top of SCCS. McVoy later commercialized a successor system called BitKeeper [Bitkeeper], which was layered on a re-implementation of SCCS, which he called BitSCCS. TeamWare and BitKeeper took advantage of the interleaved delta algorithm, also known as a weave, to implement an efficient way to represent merged deltas by reference, instead of reproducing code inside the repository. This is a lot more complicated to do with reverse deltas, introduced by RCS.* *In 2005 Linus Torvalds, creator of Linux [linux], invented the DVCS Git [git] for Linux development, and since then Git has become widely used and has supplanted BitKeeper.* [more about DVCS follows] I don't want to add more detail that would make these paragraphs any longer, but I do want them to be accurate. Thanks! Marc Rochkind -- *My new email address is mrochkind(a)gmail.com <mrochkind(a)gmail.com>*