86DOSkäyttöjärjestelmä

86DOS was an operating system developed by Seattle Computer Products (SCP) in 1980. Originally called QDOS (Quick and Dirty Operating System), it was designed to run on Intel 8086 microprocessors. Tim Paterson was the primary developer of QDOS. SCP created QDOS as a functional alternative to CP/M, which was popular for earlier 8-bit microcomputers but not optimized for the 16-bit 8086. QDOS featured a FAT file system similar to CP/M and was written largely in assembly language for performance. Microsoft, seeking an operating system for their new personal computer, the IBM PC, became interested in QDOS. In 1981, Microsoft purchased the rights to QDOS from SCP and licensed it to IBM. Microsoft then modified and rebranded QDOS as PC-DOS for IBM and MS-DOS for other manufacturers. This transaction was pivotal, as MS-DOS became the de facto standard operating system for IBM-compatible personal computers for many years, laying the foundation for Microsoft's dominance in the software industry. Although 86DOS itself is largely a historical footnote, its evolution into MS-DOS had a profound impact on the personal computing landscape.