Pascal with extensions for object-orientedmultiprogramming by Jim Welsh and D. Bustard of {Queens University, Belfast}, UK. Pascal Plus uses an "envelope" construct for both packages and classes. ["Pascal Plus - Another Language for Modular Multiprogramming", J. Welsh et al, Soft Prac & Exp 9:947 (1979)]. ["Sequential Program Structures", J. Welsh et al, P-H 1984, ISBN 0-13806828-3]. (1997-12-09)
