Note that we can use sub-categories to present the same material..
30-Pin DRAM SIMMs
30-pin SIMMs are used in older 386 and 486 systems. For 386DX and 486 systems,
you'll need to purchase these SIMMs in sets of four. For 386SX systems,
you'll need to purchase these SIMMs in pairs.
72-Pin DRAM SIMMs
72-pin SIMMs are use in newer 486 systems and Pentiums. For Pentium/PPro
systems, you'll need to purchase these SIMMs in pairs. For 486 systems,
you can add SIMMs one-at-a-time.