This report contains computer program documentation of a chemical structure information storage and retrieval system. The primary data source of this system is a drawn structural formula along with auxiliary data, such as a local control number, molecular formula, and nomenclature. The system can also accept magnetic tape input from the CAS registry system. The documentation of the programs is both functional and operational and flow charting is limited to macroflow charts. The documentation is presented at three levels First, a general description of the total system is given then a general description is given of each major subsystem and finally a detailed functional and operational description format is given for each program in the subsystem.