THE BACKGROUND, OBJECTIVES, AND ACCOMPLISHMENTS OF THE PROJECT ARE REVIEWED BRIEFLY. SPECIFIC AREAS DISCUSSED ARE ENGLISH-LANGUAGE UDC SCHEDULES, A COMPUTER-BASED UDC FILE MANAGEMENT SYSTEM, DATA BASES FOR RETRIEVAL EXPERIMENTS, AND RETRIEVAL SYSTEM EVALUATION. THE CONCLUSIONS DEAL WITH THE USEFULNESS OF THE UDC FOR MECHANIZED RETRIEVAL SYSTEMS, NEEDED RESEARCH, NEEDED ORGANIZATIONAL EFFORT, AND A PROPOSED INTERNATIONAL SEMINAR. APPENDIX 1 GIVES A BIBLIOGRAPHY OF AIP/UDC PROJECT REPORTS WITH ABSTRACTS. APPENDIX 2 GIVES INFORMATION ABOUT THE AIP/UDC PROJECT MAGNETIC TAPES AND OTHER TAPES CONTAINING AIP/UDC PROJECT MATERIALS. THESE MATERIALS INCLUDE ABOUT 50,000 UDC-INDEXED DOCUMENT REFERENCES AND THE UDC ENGLISH LANGUAGE MASTER FILES. APPENDIX 3 GIVES A SUMMARY OF THE STATUS OF THE UDC IN ENGLISH. APPENDIX 4, ISSUED SEPARATELY AS LI 000 584, IS THE UDC ENGLISH MEDIUM EDITION MANUSCRIPT. APPENDIX 5, ALSO ISSUED SEPARATELY AS LI 000 585, CONTAINS THE UDC ENGLISH LANGUAGE MASTER FILES. (AUTHOR/RP)