Dual Inline Packages (DIPs) and Memory Modules
Most memory chips are packaged into small plastic or ceramic packages called dual inline packages or DIPs. A DIP is a rectangular package with rows of pins running along its two longer edges. Older computer systems used DIP memory directly, either soldering it to the motherboard or placing it in sockets that had been soldered to the motherboard. At that time most systems had a small amount of memory (less than one megabyte) and this was the simplest way to do things. However, this arrangement caused many problems. Chips directly soldered onto the motherboard would mean the entire motherboard had to be trashed if any of the memory chips ever went bad.
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