It is patterned on ESPOL, a similar ALGOL-derived language used by the Burroughs B5000 mainframe systems, which also influenced a number of 1960s languages like PL360 and JOVIAL.
It is modeled after ESPOL, a similar ALGOL-derived language used in Burroughs B5000 mainframes, which also inspired several 1960s languages like PL360 and JOVIAL. This pattern reflects the influence of these systems on subsequent programming languages.