It is MUCH worse for Burroughs and Univac. IBM was
sold in such high numbers
that the probability of some surviving was higher. Both Burroughs and Univac
had an active "scorched earth" policies for systems in the field to keep
them out of the hands of resellers. I don't know of any Burroughs 5xxx/6xxx
systems or Univac 1100's that still exist.
I assume that B6800 in Autralia bit the dust six or seven years back.
John's Univac III is about the biggest old Univac
system that I know of.
Other than two or three 9300s, a 90/30, and a System/80 (all sort of
small machines), are there any other Univacs left? Unisys does not
count - but should.
There is also a disproportionate number of large
scientific computers that
have survived vs business systems. There much fewer in CHM's collection.
While very nice that they are still around, they do not reflect the
true life and times of a real mainframe. Boring things like payroll
and check balancing, but magnitudes more important than number
crunching for the everyday man.