The DYPAC system: A Dynamic Processor Allocation and Communication System for Distributed Memory Architectures Erich Schikuta Abstract In this report a DYnamic Processor Allocation and Communication system (DYPAC system) is presented, which establishes a programming model for the development of parallel programs independently of the underlying parallel system architecture. The DYPAC system provides functions for the creation, deletion and administration of processes and the installation of communication lines between them. Aim of the project was to create a programming tool for the development of parallel software systems with a high degree of portability. This was reached by a high level functional framework, which is independent of the underlying operating system and the physical hardware architecture.