T - Definitions

  • T

    tier 1 vendor

    A tier 1 vendor is one of the largest and most well known in its field -- often enjoying national or international recognition and acceptance...(Continued)

  • TIN (Taxpayer Identification Number)

    A Taxpayer Identification Number (TIN), in the United States, is a unique nine-digit number for identifying an individual, business or other entity in tax returns and additional documents filed with the Internal Revenue Service (IRS).