The European Commission, DG III, has published a summary of ESPRIT projects entitled "Open Microprocessor Systems Initiative. Summaries of ESPRIT projects: ESPRIT III. December 1993". The book presents an overview of the work carried out in the Open Microprocessor Systems initiative (OMI) of the ESPRIT programme. Each project is described in a standard format covering its aims, technical content, progress, results, potential impact and current status. In each case, details of participating organizations are provided together with a list of partner names and a contact address. The OMI initiative aims to identify and take account of technological advances and trends such as the move to greater on-chip systems integration, the need for simpler architectures, the wish to avoid redesign through portability, and the need for easy upgrading. OMI aims to converge with accepted technology and standards rather than compete with them, and to help Europe build critical mass by recognizing and consolidating its strengths. This updated edition incorporates the progress and results reported since late 1992 and contains the first descriptions of the many new projects launched following the ESPRIT III call for proposals in 1993.