HPRL(ID:7702/)

KRL 

Hewlett Packard Research Language (but also Hewlett Packard Research Labs, where it was developed)

Frame language
Related languages
FRL => HPRL   Implementation
References:
  • Rosenberg, S. "HPRL: A Language for Building Expert Systems" view details
          in ICJCAI 83: Proceedings of the Eighth International Joint Conference on Artificial Intelligence, Alan Bundy, editor, Karlsruhe, Germany, August 1983 view details
  • Goldstein R et al., "HPRL reference manual" Hewlett Packard Res. Lab., 1984 view details
          in ICJCAI 83: Proceedings of the Eighth International Joint Conference on Artificial Intelligence, Alan Bundy, editor, Karlsruhe, Germany, August 1983 view details