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

FRL
       Frame Representation Language (AI)


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

FRL

   Frame Representation Language.

   MIT.

   ["The FRL Manual", R. Roberts et al, AI Memo 409, MIT AI Lab,
   1977].

   (1994-12-16)