S: (n) computer accessory (an accessory for a computer) "when you add in all the computer accessories you are going to need the computer gets pretty expensive"
S: (n) fitting (a small and often standardized accessory to a larger system)
S: (n) fixings, trimmings (the accessories that normally accompany (something or some activity)) "an elaborate formal dinner with all the fixings"; "he bought a Christmas tree and trimmings to decorate it"
S: (n) component, constituent, element (an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system) "spare components for cars"; "a component or constituent element of a system"
S: (n) addition, add-on, improver (a component that is added to something to improve it) "the addition of a bathroom was a major improvement"; "the addition of cinnamon improved the flavor"
S: (n) input (a component of production; something that goes into the production of output)
S: (n) landside (component consisting of a side piece opposite the moldboard)
S: (n) making ((usually plural) the components needed for making or doing something) "the recipe listed all the makings for a chocolate cake"
S: (n) module (a self-contained component (unit or item) that is used in combination with other components)
S: (n) pixel, pel, picture element ((computer science) the smallest discrete component of an image or picture on a CRT screen (usually a colored dot)) "the greater the number of pixels per inch the greater the resolution"
S: (n) retrofit (a component or accessory added to something after it has been manufactured)