Just digitized from VHS and uploaded, the 1990 introduction to the
what turned out to be final member of the mainframe line that
started with the B2500 in 1967.
https://www.youtube.com/watch?v=IuqdfCO6dsA
It's basically a shrink of the B4955/V380 from eight large MSI boards
to six LSI CMOS gate arrays.