(1) (
Trellis-
Coded
Modulation/Viterbi Decoding) A technique that adds forward error correction to a modulation scheme by adding an additional bit to each baud. TCM is used with QAM modulation, for example.
(2) (
Total
Cost
Management) An umbrella term for managing an organization's expenditures. See
supply chain management and
e-sourcing.
(3) (
Thermal
Conduction
Module) An IBM circuit packaging technique that seals chips, boards and components into a module that serves as a heat sink. TCMs are mostly water cooled, although some are air cooled.