This course is naturally dependent on the physics and properties of semiconductors themselves. It treats devices in which both electrons and holes are involved in the transport processes. The main part of the course focuses on the types of metal oxide semiconductor field effect transistors (MOSFETS) and metal oxide semiconductor field effect transistor (MOSFET) devices which are the main types of semiconductor devices on the market. The use of transistor devices and their design will also be discussed. Also discussed are some contemporary solid state devices such as light-emitting diodes, injection lasers and solar cells.