Abstract

The paper provides an informal account of CPL, a new programming language currently being implemented for the Titan at Cambridge and the Atlas at London University. CPL is based on, and contains the concepts of, ALGOL 60. In addition there are extended data descriptions, command and expression structures, provision for manipulating non-numerical objects, and comprehensive input-output facilities. However, CPL is not just another proposal for the extension of ALGOL 60, but has been designed from first principles and has a logically coherent structure.

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