Microsoft disk operating system
| Noun | 1. Microsoft disk operating system - an operating system developed by Bill Gates for personal computers |
| 单词 | microsoft disk operating system | ||
| 释义 | Microsoft disk operating system
Microsoft Disk Operating SystemMicrosoft Disk Operating System(operating system)MS-DOS is a single user operating system that runs oneprogram at a time and is limited to working with one megabyteof memory, 640 kilobytes of which is usable for theapplication program. Special add-on EMS memory boardsallow EMS-compliant software to exceed the 1 MB limit.Add-ons to DOS, such as Microsoft Windows and DESQview,take advantage of EMS and allow the user to have multipleapplications loaded at once and switch between them. Numerous features, including vaguely Unix-like but ratherbroken support for subdirectories, I/O redirection andpipelines, were hacked into MS-DOS 2.0 and subsequentversions; as a result, there are two or more incompatibleversions of many system calls, and MS-DOS programmers cannever agree on basic things like what character to use as anoption switch ("-" or "/"). The resulting mess became thehighest-unit-volume operating system in history. It wasused on many Intel 16 and 32 bit microprocessors and IBM PC compatibles. Many of the original DOS functions were calls to BASIC (inROM on the original IBM PC), e.g. Format and Mode. Peoplewith non-IBM PCs had to buy MS-Basic (later calledGWBasic). Most version of DOS came with some version ofBASIC. Also know as PC-DOS or simply DOS, ignoring the fact thatthere were many other OSes with that name, starting in themid-1960s with IBM's first disk operating system for theIBM 360. See MSDOS Microsoft disk operating system
Synonyms for Microsoft disk operating system
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