https://en.wikipedia.org/wiki/Timeline_of_computing_1990–1999
Date Event ? First 64-bit microprocessors; the first 64-bit variant of MIPS, the MIPS R4000 was introduced in 1992 (announced October 1, 1991) and another major RISC microprocessor, DEC Alpha (no longer produced), was also introduced in 1992. Intel had introduced the Intel i860 RISC microprocessor in 1989, marketed as a "64-bit microprocessor", while it had essentially a 32-bit …