Algol

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Algol (ALGOL, ALGOrithmic Language) is a family of imperative computer programming languages developed jointly by a committee of European and American computer scientists in a meeting in 1958 at ETH Zurich (Algol 58). Algol 58 introduced code blocks and the begin and end pairs for delimiting them. Two years later, Algol 60 was specified, as the result of a meeting in Paris in January 1960 by 13 European and American scientists, Peter Naur, John Backus, John McCarthy, Friedrich L. Bauer, Adriaan van Wijngaarden, et al. Algol 60 became the standard for the publication of algorithms and had a profound effect on future language development, it was the first language implementing nested function definitions with lexical scope. Algol 68 was designed by IFIP, while Niklaus Wirth based his own Algol W on Algol 60 before moving to develop Pascal.

=Algol W= A boolean procedure in Algol W from the chess program Awit by Tony Marsland : 11662 LOGICAL PROCEDURE CLEAR(INTEGER VALUE SQA, SQF, SQT); 11663 BEGIN 11664  INTEGER DIR; 11665  LOGICAL FREE; 11666  FREE := FALSE; 11667  DIR := BOTV(EDGE, OFFSET(SQF)−OFFSET(SQT)); 11668  IF DIR ~= 0 THEN BEGIN 11669    FREE := TRUE; 11670    IF SQA ~= SQF AND 11671       DIR = BOTV(EDGE, OFFSET(SQA)−OFFSET(SQT)) 11672    THEN FREE := FALSE; 11673    FOR SQ := SQF+DIR STEP DIR UNTIL SQT−DIR 11674    DO IF FREE AND BRD(SQ) ~= 0 11675      THEN FREE := FALSE; 11676  END; 11677  FREE 11678 END CLEAR;

=Selected Publications=
 * Christopher Strachey, Maurice Wilkes (1961). Some Proposals for Improving the Efficiency of ALGOL 60. Communications of the ACM, Vol. 4, No. 11
 * V. I. Sobel'man, Mikhail R. Shura-Bura (1962). Realization of recursive procedures in the language of AlGOL-60. (Реализация Рекурсивных Процедур В Языке Алгол-60) Zhurnal Vychislitel'noi Matematiki i Matematicheskoi Fiziki, Vol. 2, No. 2

=External Links=
 * ALGOL from Wikipedia
 * ALGOL 58 from Wikipedia
 * ALGOL 60 from Wikipedia
 * ALGOL 68 from Wikipedia
 * History of ALGOL — Software Preservation Group from The Computer History Museum
 * ALGOL W from Wikipedia
 * Трансляторы с Алгола-60 - № 45, 1999 Computerworld Россия (Russian)

=References= Up one Level