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Droid from WikiPedia:

Droids are robots seen in Star Wars, Doctor Who, and Ben 10 and is a registered trademark of Lucasfilm Ltd.

Prominent examples of droids in Star Wars include R2-D2 and C-3PO. R2-D2 is an astromech droid, a class of droid used aboard spaceships for repairs and navigational computing. Protocol droids assist in communications and etiquette, and can also carry out administrative tasks; the protocol droid C-3PO is "fluent in six million forms of communication". Most protocol droids have a humanoid shape similar to that of the people around whom they work. The word droid originated as a contraction of "android", as evidenced by the fact that in the novelization of Star Wars Episode IV: A New Hope, the word is spelled with an apostrophe ('droid).

The Mel Brooks film Spaceballs parodies C-3PO with the character Dot Matrix, who acts as Princess Vespa's "droid of honour".

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