An object-oriented, concurrent, reflective language based on Hybrid Group Architecture. AbcL/R2 was produced by , , , , at the {Tokyo Institute of Technology} in 1992. As a reflective language, an AbcL/R2 program can dynamically control its own behaviour, such as scheduling policy, from within a user-program. This system has almost all functions of AbcL/1 and is written in Common Lisp. . (1993-01-28)