Components review: Semiconductor memories: More users are opting for RAMs, ROMs, and PROMs as chip function densities increase and price per bit drops

In 1970, little if any of the computer mainframe memory market was served by semiconductor memory-bits. Today, semiconductor memories serve anywhere from 30 to 50 percent of this market. Predictions are that, by 1980, well over 60 percent of all computer and minicomputer mainframe applications will make use of semiconductor memories, and this percentage does not account for IBM, which designs its own semiconductor memories for its computers.