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

Summary

Description
English: 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.
Español: Tarjeta magnética (c. 1980) como la usada en las IBM MC Selectric y IBM MC Selectric Composer. Productos compatibles estaban disponibles de Memorex y Scotch (3M).
Date
Source http://en.wikipedia.org/wiki/File:IBM_Magnetic_Card.jpg
Author Pointillist
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12 December 2007

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Date/TimeThumbnailDimensionsUserComment
current21:49, 25 September 2009Thumbnail for version as of 21:49, 25 September 2009557 × 280 (63 KB)Piero71{{Information |Description={{en|1=Magnetic card (c. 1980) as used in the IBM MC Selectric typewriter and [[en:IBM_Selectric_typewriter#Selectric_Composers|IBM MC Selectric Composer

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