Task Control Block
An MVS control block used to communicate information about tasks within an address space that are connected to an MVS subsystem such as MQSeries for MVS/ESA or CICS.FAQ.
Last updated: 2000-12-30
TARTAN ♦ taskbar ♦ Task Control Block ♦ task scheduling ♦ TASM ♦ TASS
Try this search on Wikipedia, Wiktionary, Google, OneLook.