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by Ephraim on January 5th, 2008
RAM is Random Access Memory. It is a volatile type of memory that needs electricity to flow to retain information. It is the type of memory that computers use to process programs.
ROM is Read Only Memory. Essentially it is a piece of permanently written information stored as memory. There are versions of this memory that can be rewritten but it is then called EPROM (Erasable Programmable Read Only Memory) and generally takes ultraviolet light to clear.
The easiest way to understand the difference is to think of this as a blackboard. When memory is being used as RAM, it's a blackboard that is constantly being rewritten and then washed and rewritten, thousands of times per minute. If it was ROM, the writing would be in acrylic paint, that can't be removed. EPROM would be the same paint but it can be removed by very special and specific means.
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