An object-oriented, concurrent, reflective language based on Hybrid Group Architecture. ABCL/R2 was produced by suhara@is.s.u-tokyo.ac.jp>, su@is.s.u-tokyo.ac.jp>, s.s.u-tokyo.ac.jp>, s.s.u-tokyo.ac.jp>, at the {Tokyo Institute of Technology} in 1992. As a reflective language, an ABCL/R2 program can dynamically control its own behaviour, such asscheduling policy, from within a user-program. Thissystem has almost all functions of ABCL/1 and is written in Common Lisp. . (1993-01-28)