In electronic design automation, until the 1980s schematics were the only formal representation for circuits. More recently, together with the advancement of computer technologies, other specimens were introduced and specialized computer languages have been developed, as using the explosive growth of the complexity of electronic circuits, traditional schematics are becoming less functional.
A semi-schematic diagram unites a number of the abstraction of a purely schematic diagram with other elements exhibited as realistically as you can, for various reasons. It's a compromise involving a purely abstract diagram (e.g. the design of the Washington Metro) and an exclusively pragmatic representation (e.g. the corresponding aerial perspective of Washington).
In electronic and electrical business, a schematic diagram is often utilized to refer to the design of equipment. Schematic diagrams are usually used for the upkeep and repair of electronic and electromechanical systems.  Initial schematics were done by hand, with standardized templates or off-the-shelf adhesive symbols, however now electronic design automation applications (EDA or"electric CAD") is often employed.
A schematic, or schematic diagram, would be a representation of these components of a system using abstract, picture symbols as opposed to realistic images. A schematic generally communicates all details which are not relevant to the advice the schematic is intended to communicate, and may add unrealistic elements that aid comprehension. For example, a subway map intended for passengers could signify a subway station with a dot; the dot does not resemble the true station at all but provides the viewer info without any unnecessary visual clutter. A schematic diagram of a chemical process uses symbols to represent the vessels, piping, valves, pumps, and other equipment of the machine, emphasizing their interconnection controlling and paths physiological particulars. In a digital circuit design, the design of these symbols might not resemble the design from the circuit. From the design diagram, the emblematic elements are arranged to be easily interpreted by the viewer.
These tools go beyond simple drawing of connections and devices. Usually they are incorporated into the entire IC design flow and linked to additional EDA tools for verification and simulation of the circuit under design.
Schematic diagrams have been used extensively in repair manuals to help users understand the interconnections of components, and also to offer graphical instruction to help out with dismantling and rebuilding mechanical assemblies. Many motorcycle and automotive repair manuals give a significant number of pages to schematic diagrams.
In electric power systems design, a design drawing referred to as a one-line diagram is frequently utilized to symbolize substations, distribution systems or even whole electrical power grids. All these diagrams simplify and compress the exact facts that would be repeated on each individual stage of a three-phase method, showing just one component rather than three. Electrical diagrams such as switchgear often have common device functions designate by regular function numbers.