This document summarizes the activities conducted by Telesensory Systems, Inc. (TSI) from July 1974 to July 1975. During this time, TSI worked on maintenance and updating of the Optacon (Optical-to-Tactile Converter) and Optacon peripheral equipment. The Optacon is a direct-translation device which allows the blind to read normal printed materials. TSI completed scheduled visits to all field trial sites and serviced Optacon equipment as needed. The text of the document provides a brief outline of these activities, and the appendix gives a detailed accounting of the maintenance operations that were performed on each device. (EMH)