2006-08-20 00:57:48 · 4 answers · asked by Anonymous in Computers & Internet ➔ Software
MS-DOS was developed in early 1980. CP/M was a product that was developed by Dr. Gary Kildall. He started this work in 1974 and became a commercial venture in 1976.
2006-08-20 01:05:44 · answer #1 · answered by Anonymous · 2⤊ 0⤋
CP/M came before MS-DOS.
In 1974 CP/M was a private project of Gary Kildall, under the name "Control Program/Monitor". During the conversion of CP/M to a commercial product, trademark registration documents filed in November 1977 gave the product's name as "Control Program for Microcomputers".
MS-DOS began as QDOS (for Quick and Dirty Operating System), written by Tim Paterson for computer manufacturer Seattle Computer Products (SCP) in 1980. It was marketed by SCP as 86-DOS because it was designed to run on the Intel 8086 processor. QDOS function calls were based on the dominant CP/M-80 operating system, written by Digital Research, but it used a different file system. In a sequence of events that would later inspire much folklore, Microsoft negotiated a license for QDOS from SCP in December 1980 for $25,000, then re-licensed QDOS to IBM. Microsoft then acquired all rights to QDOS for only $50,000 from SCP in July, 1981, shortly before the PC's release.
2006-08-20 01:03:51 · answer #2 · answered by Owlwings 7 · 0⤊ 0⤋
CPM is the first one
2006-08-20 01:03:24 · answer #3 · answered by zombie 5 · 0⤊ 0⤋
CP/M
2006-08-20 01:05:24 · answer #4 · answered by Anonymous · 1⤊ 0⤋