Russia was strong in MechE and material science but surprisingly weak on electronic. I think Warsaw Pact's electronic workhorse was East Germany, especially Dresden.
It was probably even. East Germany focused on Zilog clones (Z80 and Z8000 family - called U880 and U8000), while the Soviet Union focused on Intel x86 clones (https://en.wikipedia.org/wiki/K1810VM86).
The most advanced microchip produced in East Germany was the '1-MBit chip' (https://en.wikipedia.org/wiki/U61000), but AFAIK this suffered from terrible yields and didn't really go into mass production.
Here in Brno they also made world class electron microscopes & some of the leading electron microscopy companies still come from Brno or at least operate there (Delong Instruments, FEI, Thermo Fisher, etc.).
