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Definition: TB

(1) See Thunderbolt.

(2) (TB) (TeraByte) One trillion bytes (technically 1,099,511,627,776 bytes). See tera and space/time.

(3) (Tb) (TeraBit) One trillion bits (technically 1,099,511,627,776 bits). Lower case "b" for bit and "B" for byte are not always followed and often misprinted. Thus, Tb may refer to terabyte. See tera and space/time.

Terabytes in Disguise
Many designations on hard disks show terabyte storage capacities as gigabytes rather than terabytes. In this example, 2000GB is also 2TB.