Businesses in the electronic components category manufacture, distribute or sell the parts used to build, repair and maintain electronic equipment. Their stock may include passive components such as resistors, capacitors and inductors; semiconductors such as diodes, transistors and integrated circuits; and electromechanical parts including switches, relays, connectors and sockets. Other products can include sensors, oscillators, circuit protection devices, LEDs, batteries and power components. Customers may be manufacturers, repair workshops, research organisations, education providers or individual hobbyists. Suppliers can offer components for prototyping and production, including surface-mount and through-hole formats, as well as printed circuit boards and related assembly materials. Services may include helping customers identify compatible parts, checking specifications, sourcing less common or obsolete items, and supplying technical datasheets.