The central properties of an experimental system for machine translati
on, PONS, and the ideas behind them, are presented and motivated. PONS
achieves a compromise between linguistic sophistication and efficienc
y by automatically exploiting structural similarities between source a
nd target language in order to take ''shortcuts'' during the translati
on process. The system uses a PATR-type linguistic formalism to encode
LFG-type grammatical descriptions and Situation Semantics-type semant
ic descriptions, and it is implemented in Medley Interlisp.