Oldest computer you've used for "real work"?

[Marcus von Cube]

(03-21-2015 10:59 PM)TASP Wrote:  Go show a kid a rotary dial telephone!

They pick it up quickly. Here around the corner is a museum which shows an old "Vermittlungsstelle" (Branch Exchange?). To make it do something there are some rotary dial phones on the wall. A teenager was looking at his father (or was it its grandpa?) with a big question mark in his face. Only a few moments later, he knew how to place a call with a single finger instead of two thumbs.