Quick Reference Guide

440 Glossary
Windows 95
An integrated and complete Microsoft Windows operating system that does not
require MS-DOS and that provides advanced operating system performance,
improved ease of use, enhanced workgroup functionality, and simplified file
management and browsing.
Windows NT
High-performance server and workstation operating system software developed by
Microsoft that is intended for technical, engineering, and financial applications.
write-protected
Read-only files are said to be write-protected. You can write-protect a 3.5-inch
diskette by sliding its write-protect tab to the open position or by setting the
write-protect feature in the System Setup program.
X.509 Certificate
An X.509 certificate binds a public encryption key to the identity or other attribute
of its principal. Principals can be people, application code (such as a signed applet)
or any other uniquely identified entity (such as a secure port server or Web server).
XMM
Abbreviation for extended memory manager, a utility that allows application
programs and operating systems to use extended memory in accordance with the
XMS.
XMS
Abbreviation for eXtended Memory Specification.
X Windows system
The graphical user interface used in the Red Hat Enterprise Linux environment.
ZIF
Acronym for zero insertion force. Some systems use ZIF sockets and connectors
to allow devices such as the microprocessor chip to be installed or removed with
no stress applied to the device.
ZIP
A 3.5-inch removable disk drive from Iomega. Originally, it provided 100-MB
removable cartridges. The drive is bundled with software that can catalog the
disks and lock the files for security. A 250-MB version of the Zip drive also reads
and writes the 100-MB Zip cartridges.