 This led to Masuoka's invention of flash memory at Toshiba in 1980.According to Toshiba, the name "flash" was suggested by Masuoka's colleague, Shōji Ariizumi, because the erasure process of the memory contents reminded him of the flash of a camera.Masuoka and colleagues presented the invention of NOR flash in 1984, and then NAND flash at the "IEEE 1987 International Electron Devices Meeting" (IEDM) held in San Francisco.