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

GNU BC

   A GNU version of BC which is self-contained and internally
   executes its own compiled code rather than acting as a
   front-end to DC like the standard Unix bc.

   Version 1.02

   parser (yacc), interpreter, BC math library

   Philip A. Nelson 

   FTP bc-1.02.tar.Z from a GNU archive site.

   requires: vsprintf and vfprintf routines

   ports: Unix (BSD, System V, MINIX, POSIX) Superset of POSIX BC
   (P10003.2/D11), with a POSIX-only mode.