2500set

Some information about the IBM System/370.

These are DOS machines with 5¼-inch floppy drives. The one in the foreground is some kind of IBM PC/AT and probably employs an Intel 80286 CPU. The screen might be a CGA screen. The displayed stuff looks white (phosphor) to me. I think it's a WordPerfect screen. Does this screen look like XY Write or Microsoft Word? There's a glare shield over the cathode ray tube face. There's a glare from something in spite of the attenuator.

The person in the background is using what looks like an AT&T personal computer, manufactured by Olivetti.

Networks were sometimes proprietary. I worked with 2.5 megabits per second Arcnet about this time. Newer installations had 10Base2 10 megabits per second ethernet. Both of these ran over 50-ohm chnaracteristic impeadance coaxial cable.

It looks like a Pacific Telephone employee upgrading the desk phone from rotary dial to Touchtone. Because Convair was a large customer, he was probably assigned solely to work on Convair phones.