FGL

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

FGL

   1. Flow Graph Lisp.  A distributed dataflow language for AMPS
   (Applicative Multi-Processing System).  "A Loosely-Coupled
   Applicative Multi-Processing System", R. Keller et al, NCC,
   AFIPS June 1979, pp.613- 622.

   2. Function Graph Language.  Related to FEL.