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What does GTSI stand for?

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Rank Abbr.Meaning
GTSIGovernment Technology Services, Inc. (Chantilly, VA)
GTSIGreyhound Travel Services, Inc. (former subsidiary of Greyhound Lines)
GTSIGroup TETRA (Terrestrial Trunked Radio) Subscriber Identity (telecommunications)

Note: We have 4 other definitions for GTSI in our Acronym Attic