Compatibility Guide

106 Glossary
text editor
An application program for editing text files consisting
exclusively of ASCII characters. Windows Notepad is
a text editor, for example. Most word processors use
proprietary file formats containing binary characters,
although some can read and write text files.
TFTP
Abbreviation for Trivial File Transfer Protocol. TFTP
is a version of the TCP/IP FTP protocol that has no
directory or password capability.
text mode
A video mode that can be defined as x columns by y
rows of characters.
threshold values
Systems are normally equipped with various sensors
that monitor temperature, voltage, current, and fan
speed. The sensor's threshold values specify the ranges
(min and max values) for determining whether the
sensor is operating under normal, noncritical, critical
or fatal conditions. Server Administrator-supported
threshold values are
• UpperThresholdFatal
•UpperThresholdCritical
• UpperThresholdNon-critical
•Normal
• LowerThresholdNon-critical
• LowerThresholdCritical
• LowerThresholdFatal
time-out
A specified period of system inactivity that must occur
before an energy conservation feature is activated.
tpi
Abbreviation for tracks per inch.
TQFP
Abbreviation for thin quad flat pack.
TSR
Abbreviation for terminate-and-stay-resident. A TSR
program runs "in the background." Most TSR programs
implement a predefined key combination (sometimes
referred to as a hot key) that allows you to activate the
TSR program's interface while running another
program. When you finish using the TSR program, you
can return to the other application program and leave
the TSR program resident in memory for later use. TSR
programs can sometimes cause memory conflicts.
When troubleshooting, rule out the possibility of such
a conflict by rebooting your system without starting any
TSR programs.
TSOP
Abbreviation for thin small outline package. A very
thin, plastic, rectangular surface mount chip package
with gull-wing pins on its two short sides.
UART
Acronym for universal asynchronous receiver
transmitter, the electronic circuit that makes up the
serial port.
UDP
Abbreviation for user datagram protocol.
UL
Abbreviation for Underwriters Laboratories.
UMB
Abbreviation for upper memory blocks.
unicode
A fixed width, 16-bit world wide character
encoding, developed and maintained by the
Unicode Consortium.
upper memory area
The 384 KB of RAM located between 640 KB and 1 MB.
If the system has an x86 or higher microprocessor, a
utility called a memory manager can create UMBs in
the upper memory area, in which you can load device
drivers and memory-resident programs.