Compaq 9900 - Manual (Page 138)

124 Acronyms and Abbreviations
TC390 Hitachi TrueCopy – S/390 ®
TC390A Hitachi TrueCopy – S/390 ® Asynchronous
TID target ID
TPF Transaction Processing Facility
TSO Time Sharing Option (an IBM ® System/370 operating system option)
UCB unit control block
UIM unit information module
UL Underwriters’ Laboratories
µm micron, micrometer
VA volt-ampere
VAC volts
AC
VDE Verband Deutscher Elektrotechniker
VM Virtual Machine (an IBM ® S/390 ® system control program)
VOLID volume ID
volser volume serial number
XRC Extended Remote Copy (an IBM ® S/390 ® host software function)
VSE Virtual Storage Extension (an IBM ® S/390 ® operating system)
VTOC volume table of contents
W watt
WLM
Workload Manager (an IBM ® S/390 ® host software function)
XA System/370 Extended Architecture
XDF Extended Distance Feature (for ExSA channels)