ESPOL (short for Executive Systems Programming Oriented Language) was a compiler for an ALGOL 60 superset that provided capabilities of that would later be known as Mohols, machine oriented high order languages, such as interrupting a processor on a multiprocessor system (the Burroughs B5000 was a dual-processor system).

The ESPOL single pass compiler could compile over 250 lines per second and was used to write the MCP (Master Control Program) on the Burroughs 6700.

ESPOL was superseded by NEWP.

Reference

• The B6700 ESPOL Reference Manual, Burroughs, 1970

ALGOL 60 compilers