 DATARAM BULK Core, 1976) products sold as alternatives to HDDs but these products typically had memory interfaces and were not SSDs as defined.In the late 1980s, Zitel offered a family DRAM based SSD products, under the trade name "RAMDisk," for use on systems by UNIVAC and Perkin-Elmer, among others.The basis for flash-based SSDs, flash memory, was invented by Fujio Masuoka at Toshiba in 1980 and commercialized by Toshiba in 1987.