It is weird how they use the letter Я ("ya") as a "Russian" version of R. The Russian (actually Cyrillic) version of R is "P". So I read the name with flipped "R" as "Tetyais" and it makes no sense.
Also I wonder how Vadim Gerasimov managed to obtain an IBM PC-compatible computer: where he got the money and what store would be selling that. This shows how unequal and unfair the society became when reforms began at the late USSR. In earlier USSR, everybody would equally and fairly have no computer.
As a Russian programmer, certainly you are aware of Elektronika 60 and Dorodnitsyn Computing Center? Regarding я, it is the same shape as R but backwards and feels exotic, nothing too complex there.