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Language peer sets for CAL:
United States
United States/1967
Designed 1967
1960s languages
Third generation
High Cold War
Genus Generation of JOSS I
Generation of JOSS I
JOSS family
Generation of JOSS I/1967
JOSS family/1967
Generation of JOSS I/United States
JOSS family/United States
Conversational/United States


Conversational algebraic language 

alternate simple view
Country: United States
Designed 1967
Genus: Generation of JOSS I
Sammet category: On-Line

Conversational Algebraic Language

Butler Lampson, Berkeley, 1967

Extension of JOSS, with additional plotting features using Project Genie graphic displays

Related languages
JOSS CAL   Based on
CAL SuperBasic   Incorporated some features of

  • Clapp (1967) Clapp, Lewis "Time-Sharing System Scorecard" Computer Research Corporation 1967
  • Lampson, Butler W. (1967) Lampson, Butler W. "CAL reference manual" Reprod. by the Clearinghouse for Federal Scientific and Technical Information. Berkeley, Calif.: University of California 1967 R-23. AD 707 367 pdf Extract: Introduction
  • Schur, Lee Davis; (1973) Schur, Lee Davis; "Time-shared computer languages: an introduction to conversational computing" London: Addison-WesIey 1973
    • Programming languages and compilers by Butler Lampson
      This language was a derivative of Joss, but used statement-level incremental compilation. I designed it and did all the implementation. It was widely used on the SDS 940, and many of its techniques were adopted by Tymshare for their interactive SuperBasic system

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