ALGOL 68-R definition language
A restriction of ALGOL 68
permitting one-pass compilation, developed at the Royal Signals Radar Establishment, Malvern, Worcester, UK in April 1970. Identifiers
, modes and operators must be declared before use. There is no automatic proceduring and no concurrency
. It was implemented in ALGOL 60
under GEORGE 3
on an ICL 1907F.
["ALGOL 68-R, Its Implementation and Use", I.F. Currie et al, Proc IFIP Congress 1971, N-H 1971, pp. 360-363].