it it /ɪt/

pronoun

1. () Referring to a previously mentioned object, animal, or concept.  ( it )
   Referring to a previously mentioned object, animal, or concept.
   

 IT

noun

1. The branch of engineering that deals with the use of computers and telecommunications to retrieve and store and transmit information  ( information technology , IT , infotech )
   the branch of engineering that deals with the use of computers and telecommunications to retrieve and store and transmit information