Static RAM. A type of random access memory that does not need to have its power refreshed in order to continue to hold data — as opposed to DRAM, where the power must be continually refreshed or the stored data will be lost. Note, however, that SRAM is a type volatile memory. Any data being stored will still be lost when the power supply is turned off.
SRAM is generally faster than DRAM and uses less power, but is more expensive.