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Computing (FOLDOC) dictionary
Single In-line Memory Module
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storage (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.