Must have been early 1980s?
By the way, the computer they are using is by UK manufacturer Acorn.
When Acorn did their next computer model after that one, they designed a totally new kind of CPU for it called ARM. That's the same ARM chip series which is nowadays in pretty much everything portable including iPhones, iPads, Androids, Smartwatches, Nintendo Switch etc.
So, in a way, that computer there is the forerunner of almost all the smart devices people use now.
@FediThing @anguinea @stux It's not the same ARM chip series but the same ARM instruction set. Slightly difference.