There is an interesting segment about Kraftwerk getting their first ever PC in 1981, in this new interview with Ralf Hütter.
Then we composed the concept of [the album] Computer World coming out in 81 and we didn't even have computers at that time. So that was more like a visionary album. We only got that technology, a small PC, around the tour of that album and we used one on stage just writing letters. Just typing them in, not even in synch or anything. Just live, and a guy putting that on screen.
The above image is from a concert at Captain Vidéo in Paris, France, July 7th 1981. Could the text on those screens have been typed "live"?