Standard Modular System: Difference between revisions

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Overview: add two photos
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File:IBM SMS card component side.jpg|SMS card from an IBM 1401
File:IBM SMS card circuit side.agr.jpg.jpg|Circuit side of same SMS card
File:IBM SMS card, front.jpg|SMS card, front
File:IBM SMS card, back.jpg|SMS card, back
File:SMS card with power transistors.jpg|SMS card from an IBM 1401
File:IBM 1401 card cage 2.agr.jpg|IBM 1401 card cage