[mpchlets]

70's SCSS - Bell Labs, first source control, single user

80's RCS (single user) and then CVS (multiple users)

90's CVS and then Perforce

I don't know, this is from my memory, google can fill in the gaps.

[sdesol]

The 90's also had ClearCase, which is quite revolutionary for its time and I guess it still is. It was a beast to maintain and IBM was making a killing in annual license fee (~3000 per license)