OBJ

Joseph Goguen 1976. A family of declarative "ultra high

level" languages. Abstract types, generic modules, subsorts

(subtypes with multiple inheritance), pattern-matching

modulo equations, E-strategies (user control over laziness),

module expressions (for combining modules), theories and views

(for describing module interfaces). For the massively

parallel RRM (Rewrite Rule Machine).

["Higher-Order Functions Considered Unnecessary for

Higher-Order Programming", J.A. Goguen, in Research Topics in

Functional Programming].