An 8-tube module from a 1954 IBM mainframe examined: it's a key debouncer
Ruggedized Vacuum Tube by IBM / When computers were the si… | Flickr
vacuum tube technology
Category:IBM vacuum tube computers - Wikipedia
IBM - From the archives: in 1943, IBM develops the Vacuum Tube Multiplier, which becomes the first complete machine to perform arithmetic electronically. #TBT | Facebook
Vaccuum Tube Assembly
VacuumTube computers #computer - YouTube
IBM TH-537 Finger Module (5696 Thyratron Tube) - Industrial Alchemy