This report outlines the development of the UDECOM system (UNIVAC-DIGITAL EQUIPMENT CORPORATION DATA COMMUNICATION SYSTEM). UDECOM is the implementation of a software package for the DEC PDP-8/I computer which enables data communication with the UNIVAC 1108 computer. Also described are the results of research into the U1108/U1004 data communication system. The functional description of the PDP-8/I and the associated DEC DP01 data communication channel and AT&T 201-A3 data set is defined. The UDECOM system design section outlines the proposed design and implementation phases of the communication system. Finally, the current status of the project is outlined. (RR)