Executive Systems Problem Oriented Language
ESPOL (short for Executive Systems Programming Oriented Language) was a compiler for an ALGOL 60 superset that provided capabilities of what would later be known as Mohols, machine oriented high order languages, such as interrupting a processor on a multiprocessor system (the Burroughs large systems were multiprocessor processor systems.)
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 B6700.
ESPOL was superseded by NEWP.