SIMM, short for Single In-line Memory Module, is a type of computer memory chip module. It is used in older computers and has been replaced by DIMMs. Some synonyms for SIMM include DRAM, memory module, computer memory, and RAM. All of these terms refer to the same hardware component that stores data for a computer to access quickly. Although SIMMs are not commonly used anymore, they were popular in the 1990s and early 2000s. It is important for those working with older computers to be familiar with these terms and their meanings in order to properly maintain and repair the hardware.