[rsecora]

Maybe you are asking about TeamWare [1]. It was the Sun Microsystems VCS based on SCCS and using NFS.

There exists an abundance of resources related to TeamWare. From online documentation [2], to patents [3]...

[1] https://en.wikipedia.org/wiki/Sun_WorkShop_TeamWare

[2] https://docs.oracle.com/cd/E19957-01/806-3573/TeamWareTOC.ht...

[3] https://patents.google.com/patent/US5481722