About GMS Email Technical Manuals and CAD Design and Drafting What is a technical manual? A Technical Manual is a manual the incorporates technical data with graphic design. Normally a technical manual will include a mix of Cad Drawings, Technical Illustrations, Detailed Instructions, Parts Lists, Procedures, Policies, Safety Details, Graphs, Charts, Tables and and more. Some can just be procedural such as Safety Manuals and Employee Handbooks but others can be extremely detailed like Installation Instructions, Maintenance Procedures, Operation Manuals, etc. At Graphical Media Services we have degreed personnel that can handle all of these requirements.