Advanced MOS and bipolar technologies, using

m lithography, have increased dramatically the complexity of 16K to 256K SRAMs and reduced access time to 3 to 30ns, respectively. Meanwhile, GaAs technology has produced 1 to 3ns, and 1K to 4K SRAMs. The present status and the future projections of these competing technologies will be discussed. The user\´s point-of-view assessing implementation of high speed SRAMS in a system environment will be offered.