Single In-line Memory Module

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Related to Single In-line Memory Module: Dual Inline Memory Module

single in-line memory module

[¦siŋ·gəl ¦in ‚līn ′mem·rē ‚mä·jəl]
(computer science)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Single In-line Memory Module

(SIMM) A small circuit board or substrate, typically about 10cm x 2cm, with RAM integrated circuits or die on one or both sides and a single row of pins along one long edge. Several SIMMs are mounted with their substrates at right-angles to the main circuit board (the motherboard). This configuration allows greater packing density than direct mounting of, e.g. DIL (dual in-line) RAM packages on the motherboard. In 1993 one SIMM typically held one or four megabytes, by early 1997 one could hold 8, 16, or 32 MB.
This article is provided by FOLDOC - Free Online Dictionary of Computing (


(Single In-line Memory Module) An earlier printed circuit board that holds memory chips and plugs into a SIMM socket on the motherboard. See memory module.
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