noun (n)

• a unit of information equal to 1000 gigabytes or 10^12 (1,000,000,000,000) bytes(noun.quantity)

  Synonym:
  tb
  

  source: wordnet30
• a unit of information equal to 1024 gibibytes or 2^40 (1,099,511,627,776) bytes(noun.quantity)

  Synonym:
  tb, tebibyte, tib
  

  source: wordnet30