The Collaborative International Dictionary of English v.0.48:

Ta \Ta\, v. t.
   To take. [Obs. or Scot.] --Cursor Mundi.
   [1913 Webster]

   Note: Used by Chaucer to represent a peculiarity of the
         Northern dialect.
         [1913 Webster]

WordNet (r) 3.0 (2006):

Ta
    n 1: a hard grey lustrous metallic element that is highly
         resistant to corrosion; occurs in niobite and fergusonite
         and tantalite [syn: tantalum, Ta, atomic number 73]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

TA
       Transmitter Address (FPK)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

TA
       TerminalAdapter (ISDN)


The Free On-line Dictionary of Computing (30 December 2018):

Terminal Adaptor
TA
terminal adapter

    (TA) Equipment used to adapt
   Integrated Services Digital Network (ISDN) Basic Rate
   Interface (BRI) channels to existing terminal equipment
   standards such as EIA-232 and V.35.  A Terminal Adaptor is
   typically packaged like a modem, either as a stand-alone
   unit or as an interface card that plugs into a computer or
   other communications equipment (such as a router or PBX).
   A Terminal Adaptor does not interoperate with a modem; it
   replaces it.

   [ISDN FAQ].

   (1994-10-03)