An electronic component is any basic discrete device or physical entity in an electronic system used to affect electrons
or their associated fields. Electronic components are mostly industrial products, available in a singular form and are
not to be confused with electrical elements, which are conceptual abstractions representing idealized electronic
components and elements.
Electronic components have a number of electrical terminals or leads. These leads connect to other electrical
components, often over wire, to create an electronic circuit with a particular function.
Sub-assemblies are a series of parts that are combined to form a unique component. Sub-assemblies can be combined to make a larger assembly used on production lines or in service applications.
A spare part, spare, service part, repair part, or replacement part, is an interchangeable part that is kept in an inventory and used for the repair or replacement of failed units