Image:IBM Magnetic Card.jpg

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IBM_Magnetic_Card.jpg‎ (557 × 280 pixels, file size: 63 KB, MIME type: image/jpeg)

[edit] Summary

Magnetic card (c. 1980) as used in the IBM MC Selectric typewriter and IBM MC Selectric Composer. Compatible products were available from Memorex and Scotch (3M).

The pair of longitudinal wide parallel bars are abrasion from the friction rollers that moved the card relative to the reader, and ejected the card on demand. The number (2564 in this example) is not a product code but a random code so that a specific card could be identified.

Image (and ruler) were scanned from a physical card on 2007-12-12.

[edit] Licensing

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