When dealing with atmospheric pollution, it is necessary to amass, catalog, sort, evaluate and perform calculations upon large volumes of data. The Emissions Inventory System/Point Source (EIS/PS) provides air pollution control agencies with the capability to create and maintain their own data bases of point source data and to retrieve data and generate reports from those data bases. This report contains step by step procedures for the operation of each program in the system. Each program has sections containing a description, file formats, options, error messages, catalogues JCL (IBM), warnings and special instruction, cost considerations, and related programs and procedures. The report is structured along system functional lines; i.e., file creation and maintenance, data accessing and manipulation, and reports. There is also a section dealing with inter-functional procedures and one which deals with JCL and general topics. The EIS/PS is compatible with NEDS and will automatically handle EPA reporting requirements.