TENEX, a paged time sharing system for the PDP - 10
Communications of the ACM
LISP 1.5 Programmer's Manual
Automated programmering: the programmer's assistant
AFIPS '72 (Fall, part II) Proceedings of the December 5-7, 1972, fall joint computer conference, part II
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CLISP is an attempt to make LISP programs easier to read and write by extending the syntax of LISP to include infix operators, IF-THEN statements, FOR-DO-WHILE statements, and similar ALGOL-like constructs, without changing the structure or representation of the language. CLISP is implemented through LISP's error handling machinery, rather than by modifying the interpreter: when an expression is encountered whose evaluation causes an error, the expression is scanned for possible CLISP constructs, which are then converted to the equivalent LISP expressions. Thus, users can freely intermix LISP and CLISP without having to distinguish which is which. Emphasis in the design and development of CLISP has been on the system aspects of such a facility, with the goal in mind of producing a useful tool, not just another language. To this end, CLISP includes interactive error correction and many 'Do-what-I-Mean* features.