No questions, but big thanks, very interesting! A little nitpick: > И indicates a digital circuit, while ИЕ is a counter digital circuits were not only [И-],

No questions, but big thanks, very interesting! A little nitpick: > И indicates a digital circuit, while ИЕ is a counter digital circuits were not only [И-], this prefix means arithmetic and register-based circuits. Because there were a lot more “digital” circuits starting with [Л-] (L- means Logic), [A-] for transmission gates and bus arbiters. [B-] for microprocessors and related stuff, [Р-] for memory, etc... The almost complete list can be found here: https://electronics.fandom.com/ru/wiki/%D0%9E%D0%B1%D0%BE%D0%B7%D0%BD%D0%B0%D1%87%D0%B5%D0%BD%D0%B8%D1%8F_%D0%BC%D0%B8%D0%BA%D1%80%D0%BE%D1%81%D1%85%D0%B5%D0%BC_(%D0%A1%D0%A1%D0%A1%D0%A0_%E2%80%94_%D0%A0%D0%BE%D1%81%D1%81%D0%B8%D1%8F) https://electronics.fandom.com/ru/wiki/%D0%9E%D0%B1%D0%BE%D0...