porazený husia nezaplatený analog tube calculator sedliacky lapanie po dychu Scully
Analog and hybrid computers - technikum29 | Old technology, Vintage electronics, Computer
The History Of The Calculator: When was the Calculator First Invented?
Electronic Calculators—Desktop -- Vacuum Tubes to Transistors—From the Anita Mark VIII to Hewlett Packard and Wang | National Museum of American History