In this report we describe a Pascal system that has been developed for programming Mosaic multi-
computers. The system that we discuss runs on our Sun workstations, and we assume some familiarity
with the use thereof. We assume the reader to be also familiar with programming in Pascal, and with
message-passing programs. We describe how the Pascal language has been extended to perform message
passing. We discuss a few implementation aspects that are relevant only to those users who have a need
(or desire) to control some machine-specific aspects. The latter requires some detailed knowledge of the
Mosaic system
