The Austrian Center for Parallel Computation (ACPC) is a cooperative research organization founded in 1989 to promote research and education in the field of software for parallel computer systems. The areas in which the ACPC is active include algorithms, languages, compilers, programming environments, and applications for parallel and high-performance computing systems. This volume contains the proceedings of the First International Conference of the SCPC, held in Salzburg, Austria, September 30 - October 2, 1991. Authors from 15 countries submitted 66 papers, from which 28 were selected and presented at the conference. They appear in this volume together with 8 invited papers by distinguished researchers. Based on the quality of the papers presented and the response of the participants, the ACPC has decided to organize a conference every other year. The second ACPC conference will take place in Vienna in June 1993.