SMS cards: The technology inside IBM’s 1960s mainframes
Posted by jpluimers on 2015/12/11
When SMS means Standard Module System.
Pure Geek Porn, for instance this triple AND gate:

triple AND gate with germanium transistors and diodes
Thanks Jan Wildeboer for sharing this.
–jeroen
via: SMS cards: The technology inside IBM’s 1960s mainframes.






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