[cesaref]

I was involved in writing ATC software in the 90s for a European country (the FATMI system for Finland), and they were definitely using paper strips at the time, and I believe the design did not change this. I wasn't involved in the flight strip printing though, I was working on SIDs and STARs, airspace sectorisation, that sort of thing.

It would be interesting to know how things have changed since then, as obviously nearly 30 years has passed since that system would have been commissioned!