I don't think the number is too small. These components were super-expensive, not too available and USSR was in a very, very bad shape in the 80s. Note that the Eastern Bloc countries had it better than USSR at that time - better quality of life, better economy, some even produced computer parts locally and were able to hold onto them instead of being forced to send them to the USSR (Bulgaria and Czechoslovakia, for example).
I'd be surprised if there were more than 10k computers in the entire Eastern Bloc in 1986. Even pocket calculators were an expensive luxury item, and people were hacking them to have at least some kind of computer.
I'd be surprised if there were more than 10k computers in the entire Eastern Bloc in 1986. Even pocket calculators were an expensive luxury item, and people were hacking them to have at least some kind of computer.