IAM

from The Free On-line Dictionary of Computing (8 July 2008)

IAM

   Interactive Algebraic Manipulation.  Interactive {symbolic
   mathematics} for {PDP-10}.

   ["IAM, A System for Interactive Algebraic Manipulation", C.
   Christensen et al, Proc Second Symp Symb Alg Manip, ACM Mar
   1971].

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

IAM
       Identity and Access Management

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

IAM
       Initial Address Message