Editing ALGOL 68 (section)

====ALGOL 68-R====
The first implementation of the standard, based on the late-1968 draft Report, was introduced by the [[Royal Radar Establishment]] in the UK as [[ALGOL 68-R]] in July 1970. This was, however, a subset of the full language, and [[Barry Mailloux]], the final editor of the Report, joked that "It is a question of morality.  We have a Bible and you are sinning!"<ref name="implement">{{citation |editor-first=J. E. L. |editor-last=Peck |date=1970 |title=Proceedings of the IFIP working conference on ALGOL 68 Implementation |publisher=North-Holland |place=Munich |isbn=0-7204-2045-8}}</ref> This version nevertheless became very popular on the [[International Computers Limited|ICL]] machines, and became a widely-used language in military coding, especially in the UK.<ref name=shorter>{{cite web |first=C. H. A. |last=Koster |title=A Shorter History of Algol 68 |archive-url=https://web.archive.org/web/20071217203826/http://npt.cc.rsu.ru/user/wanderer/ODP/ALGOL68.txt |url=http://npt.cc.rsu.ru/user/wanderer/ODP/ALGOL68.txt |archive-date=2007-12-17}}</ref>

Among the changes in 68-R was the requirement for all variables to be declared before their first use. This had a significant advantage that it allowed the compiler to be one-pass, as space for the variables in the [[activation record]] was set aside before it was used. However, this change also had the side-effect of demanding the '''PROC'''s be declared twice, once as a declaration of the types, and then again as the body of code. Another change was to eliminate the assumed '''VOID''' mode, an expression that returns no value (named a ''statement'' in other languages) and demanding the word '''VOID''' be added where it would have been assumed. Further, 68-R eliminated the explicit [[Parallel computing|parallel processing]] commands based on '''PAR'''.<ref name=implement/>