V. Bala and S. Kipnis. Process groups: a mechanism for the coordination of and communication among processes in the Venus collective communication library. Technical report, IBM T. J. Watson Research Center, October 1992. Preprint.
 V. Bala, S. Kipnis, L. Rudolph, and Marc Snir. Designing efficient, scalable, and portable collective communication libraries. Technical report, IBM T. J. Watson Research Center, October 1992. Preprint.
 Purushotham V. Bangalore, Nathan E. Doss, and Anthony Skjellum. MPI++: Issues and Features. In OON-SKI '94, page in press, 1994.
 A. Beguelin, J. Dongarra, A. Geist, R. Manchek, and V. Sunderam. Visualization and debugging in a heterogeneous environment. IEEE Computer, 26(6):88--95, June 1993.
 Luc Bomans and Rolf Hempel. The Argonne/GMD macros in FORTRAN for portable parallel programming and their implementation on the Intel iPSC/2. Parallel Computing, 15:119--132, 1990.
 R. Butler and E. Lusk. User's guide to the p4 programming system. Technical Report TM-ANL--92/17, Argonne National Laboratory, 1992.
 Ralph Butler and Ewing Lusk. Monitors, messages, and clusters: the p4 parallel programming system. Journal of Parallel Computing, 1994. to appear (Also Argonne National Laboratory Mathematics and Computer Science Division preprint P362-0493).
 Robin Calkin, Rolf Hempel, Hans-Christian Hoppe, and Peter Wypior. Portable programming with the parmacs message--passing library. Parallel Computing, Special issue on message--passing interfaces, to appear.
 S. Chittor and R. J. Enbody. Performance evaluation of mesh--connected wormhole--routed networks for interprocessor communication in multicomputers. In Proceedings of the 1990 Supercomputing Conference, pages 647--656, 1990.
 S. Chittor and R. J. Enbody. Predicting the effect of mapping on the communication performance of large multicomputers. In Proceedings of the 1991 International Conference on Parallel Processing, vol. II (Software), pages II--1 -- II--4, 1991.
 J. Dongarra, A. Geist, R. Manchek, and V. Sunderam. Integrated PVM framework supports heterogeneous network computing. Computers in Physics, 7(2):166--75, April 1993.
 J. J. Dongarra, R. Hempel, A. J. G. Hey, and D. W. Walker. A proposal for a user-level, message passing interface in a distributed memory environment. Technical Report TM-12231, Oak Ridge National Laboratory, February 1993.
 Nathan Doss, William Gropp, Ewing Lusk, and Anthony Skjellum. A model implementation of MPI. Technical report, Argonne National Laboratory, 1993.
 Edinburgh Parallel Computing Centre, University of Edinburgh. CHIMP Concepts, June 1991.
 Edinburgh Parallel Computing Centre, University of Edinburgh. CHIMP Version 1.0 Interface, May 1992.
 D. Feitelson. Communicators: Object-based multiparty interactions for parallel programming. Technical Report 91-12, Dept. Computer Science, The Hebrew University of Jerusalem, November 1991.
 Hubertus Franke, Peter Hochschild, Pratap Pattnaik, and Marc Snir. An efficient implementation of MPI. In 1994 International Conference on Parallel Processing, 1994.
 G. A. Geist, M. T. Heath, B. W. Peyton, and P. H. Worley. A user's guide to PICL: a portable instrumented communication library. Technical Report TM-11616, Oak Ridge National Laboratory, October 1990.
 William D. Gropp and Barry Smith. Chameleon parallel programming tools users manual. Technical Report ANL-93/23, Argonne National Laboratory, March 1993.
 O. Kramer and H. Muhlenbein. Mapping strategies in message--based multiprocessor systems. Parallel Computing, 9:213--225, 1989.
 nCUBE Corporation. nCUBE 2 Programmers Guide, r2.0, December 1990.
 Parasoft Corporation, Pasadena, CA. Express User's Guide, version 3.2.5 edition, 1992.
 Paul Pierce. The NX/2 operating system. In Proceedings of the Third Conference on Hypercube Concurrent Computers and Applications, pages 384--390. ACM Press, 1988.
 A. Skjellum and A. Leung. Zipcode: a portable multicomputer communication library atop the reactive kernel. In D. W. Walker and Q. F. Stout, editors, Proceedings of the Fifth Distributed Memory Concurrent Computing Conference, pages 767--776. IEEE Press, 1990.
 A. Skjellum, S. Smith, C. Still, A. Leung, and M. Morari. The Zipcode message passing system. Technical report, Lawrence Livermore National Laboratory, September 1992.
 Anthony Skjellum, Nathan E. Doss, and Purushotham V. Bangalore. Writing Libraries in MPI. In Anthony Skjellum and Donna S. Reese, editors, Proceedings of the Scalable Parallel Libraries Conference, pages 166--173. IEEE Computer Society Press, October 1993.
 Anthony Skjellum, Steven G. Smith, Nathan E. Doss, Alvin P . Leung, and Manfred Morari. The Design and Evolution of Zipcode. Parallel Computing, 1994. (Invited Paper, to appear in Special Issue on Message Passing).
 Anthony Skjellum, Steven G. Smith, Nathan E. Doss, Charles H. Still, Alvin P. Leung, and Manfred Morari. Zipcode: A Portable Communication Layer for High Performance Multicomputing. Technical Report UCRL-JC-106725 (revised 9/92, 12/93, 4/94), Lawrence Livermore National Laboratory, March 1991. To appear in Concurrency: Practice & Experience.
 D. Walker. Standards for message passing in a distributed memory environment. Technical Report TM-12147, Oak Ridge National Laboratory, August 1992.