User's Manual

240 Glossary
• 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.
TPM
Acronym for Trusted Platform Module
TQFP
Acronym 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 computer without
starting any TSR programs.
UART
Acronym for universal asynchronous receiver transmitter, the electronic circuit
that makes up the serial port.
UDP
Acronym for user datagram protocol.
UL
Abbreviation for Underwriters Laboratories.
UMB
Abbreviation for upper memory blocks.