I'm pretty sure there were PostgreSQL releases before Postgres'95.
The 95 was kind of a joke on Linux Torvald's announcement of
a closed Linux95, which (of course) was a jab at Microsoft Win95.
I seem to recall that Postgres95 was a blip in the numbering, but
I'm not sure where it fit. Between 5.something and 6.1? Not sure.
It has been a while.
-- cary