| slovo | definícia |
disk operating system
(encz) | disk operating system,diskový operační systém luke |
disk operating system
(wn) | disk operating system
n 1: an operating system that is on a disk [syn: DOS, {disk
operating system}] |
disk operating system
(foldoc) | Disk Operating System
(DOS) The original disk operating system
from IBM.
DOS was the low-end OS of choice on the IBM 360, the
high-end system was called just "OS". DOS had a smaller
kernel and less functionality than OS and could run on the
typical 32K 360/30 and 64K 360/40 class machines.
DOS was a successor to TOS.
(1999-01-20)
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disk operating system
(foldoc) | disk operating system
(DOS) The name of a number of {operating
systems} which include facilities for storing files on disk,
often used to refer to Microsoft DOS. Such a system must
handle physical disk I/O, the mapping of file names to disk
addresses and protection of files from unauthorised access (in
a multi-user system).
A DOS should present a uniform interface to different storage
device such as floppy disks, hard disks and {magnetic
tape} drives. It may also provide some kind of locking to
prevent unintentional simultaneous access by two processes to
the same file (or record).
(1998-07-08)
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| | podobné slovo | definícia |
microsoft disk operating system
(wn) | Microsoft disk operating system
n 1: an operating system developed by Bill Gates for personal
computers [syn: MS-DOS, {Microsoft disk operating
system}] |
microsoft disk operating system
(foldoc) | Microsoft Disk Operating System
Microsoft DOS
MS-DOS
/M S doss/ (Or "MS-DOS", "PC-DOS",
"MS-DOG", "mess-dos") Microsoft Corporation's clone of
the CP/M disk operating system for the 8088 crufted
together in 6 weeks by hacker Tim Paterson, who is said to
have regretted it ever since.
MS-DOS is a single user operating system that runs one
program at a time and is limited to working with one megabyte
of memory, 640 kilobytes of which is usable for the
application program. Special add-on EMS memory boards
allow 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 multiple
applications loaded at once and switch between them.
Numerous features, including vaguely Unix-like but rather
broken support for subdirectories, I/O redirection and
pipelines, were hacked into MS-DOS 2.0 and subsequent
versions; as a result, there are two or more incompatible
versions of many system calls, and MS-DOS programmers can
never agree on basic things like what character to use as an
option switch ("-" or "/"). The resulting mess became the
highest-unit-volume operating system in history. It was
used on many Intel 16 and 32 bit microprocessors and {IBM
PC} compatibles.
Many of the original DOS functions were calls to BASIC (in
ROM on the original IBM PC), e.g. Format and Mode. People
with non-IBM PCs had to buy MS-Basic (later called
GWBasic). Most version of DOS came with some version of
BASIC.
Also know as PC-DOS or simply DOS, ignoring the fact that
there were many other OSes with that name, starting in the
mid-1960s with IBM's first disk operating system for the
IBM 360.
[Jargon File]
(2007-05-21)
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realtime disk operating system
(foldoc) | Realtime Disk Operating System
RDOS
A Data General operating system
developed in the 1970s or 1980s. When used in conjuction with
a BASIC (e.g. Business Basic) it could support 16
concurrent users at the record locking level and two
printers all on 128K memory.
Reputedly IBM wanted to license this for the first IBM PC
but DG turned them down so they went to Microsoft instead.
How different the world could have been.
[Before or after IBM wanted CP/M?]
(1997-11-23)
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