Or, it can refer to any product that includes some special feature or extra component.

This maintenance philosophy requires custom development with extra components.

These openers need a few extra components to function safely for residential use.

These extra components are geared towards making the software better able to fulfill the needs of larger companies and call centers.

Some head units have an integrated satellite tuner, eliminating the need for the extra component.

We'll also look at some of the extra components you can add to put the finishing touches on your home theater system.

For best performance, small planes need to be light, and the extra components and stronger structure needed to make the car drivable create excessive weight.

Arthur Bloch once joked that after an instrument has been assembled, extra components will be found on the work bench.

"The energy in this extra component is something like 10 billion Suns," he said.

Minimal extra components, usually of high quality.