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Definición
Portable Operating System Interface
<operating system, standard> (POSIX) A set of IEEE standards
designed to provide application portability between Unix
variants. IEEE 1003.1 defines a Unix-like operating system
interface, IEEE 1003.2 defines the shell and utilities and
IEEE 1003.4 defines real-time extensions.
["More UNIX For Dummies", ISBN: 1-56884-361-5 ] says it stands
for "Portable Operating System Interface with an X thrown in
to make it sound cooler."
(1997-12-04)
Wikipedia
.sys
.sys is a filename extension used in MS-DOS applications and Microsoft Windows operating systems. They are system files that contain device drivers or hardware configurations for the system.
Most DOS .sys files are real mode device drivers. Certain files using this extension are not, however:
- MSDOS.SYS and IO.SYS are core operating system files in MS-DOS and Windows 9x.
- CONFIG.SYS is a text file that contains various configuration options and specifies what device drivers will be loaded.
- COUNTRY.SYS is a binary database containing country and codepage related information for use with the CONFIG.SYS COUNTRY directive and the NLSFUNC driver.
- KEYBOARD.SYS is a binary database containing keyboard layout related information including short P-code sequences to be executed by an interpreter inside the KEYB keyboard driver.
