of the MPI Standard the very few difecon between MPLLd MeL12 butre diterences betwern MPk12 and MPI-2. Version 1.1:June,1995 Beginning in March,1995,the Me ge-Passing Interface Forum ow as Version 1.0. from Version 1.0 are minor. 1 Version 1.0:May,1994.The Message-Passing Interface Forum,with participation from over 40 organizations,has been meeting since January 1993 to discuss and define a set of library interface standards for message passing.The Message-Passing Interface Forum is 15 not sanctioned or supported by any official standards organization. The goal of the Message-Passing Interface,simply stated,is to develop a widely used standard for writing message-passing programs. As such the interface should establish a practical,portable,efficient,and flexible standard for message-passing. This is the final report,Version 1.0,of the Message-Passing Interface Forum.This document contains all the technical features proposed for the interface.This copy of the 2 draft was processed by LYTEX on May 5,1994. 2 32 222 2new function in MPI-1.2 is one for identifying to which version of the MPI Standard the implementation conforms. There are small differences between MPI-1 and MPI-1.1. There are very few differences between MPI-1.1 and MPI-1.2, but large differences between MPI-1.2 and MPI-2. Version 1.1: June, 1995. Beginning in March, 1995, the Message-Passing Interface Forum reconvened to correct errors and make clarifications in the MPI document of May 5, 1994, referred to below as Version 1.0. These discussions resulted in Version 1.1. The changes from Version 1.0 are minor. A version of this document with all changes marked is available. Version 1.0: May, 1994. The Message-Passing Interface Forum, with participation from over 40 organizations, has been meeting since January 1993 to discuss and define a set of library interface standards for message passing. The Message-Passing Interface Forum is not sanctioned or supported by any official standards organization. The goal of the Message-Passing Interface, simply stated, is to develop a widely used standard for writing message-passing programs. As such the interface should establish a practical, portable, efficient, and flexible standard for message-passing. This is the final report, Version 1.0, of the Message-Passing Interface Forum. This document contains all the technical features proposed for the interface. This copy of the draft was processed by LATEX on May 5, 1994. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 iv