We used Teamware, then Mercurial. Always in a rebase workflow, at least from 1992 onward IIRC (I was there from late 2002 through one year past the completion

We used Teamware, then Mercurial. Always in a rebase workflow, at least from 1992 onward IIRC (I was there from late 2002 through one year past the completion of the Oracle acquisition).