International Standard Lisp.
An object-oriented Lisp intended as an international replacement for Common Lisp, EuLisp, Le-Lisp and Scheme. The standard's goals are object orientation, extensibility, efficiency, and suitability for non-academic use.
The standard is defined in ISO WG 16, draft Dec 1992.
ftp://ma2s2.mathematik.uni-karlsruhe.de/pub/lisp/islisp/.