Tad is a word meaning 'a little bit'.It can also refer to:
A Tad : A small amount. a small child perhaps from tadpole
|TAD| The Allied Defense, a club with the Dark Jedi Organization that supports Medal of Honor: Allied Assault, Battlefield 2, and Battlefield 2142.
TAD, an acronym for Telephone Answering Device
Tad , a Seattle band.
The pen name of American cartoonist Thomas A. Dorgan.
Tax Allocation District.
A masculine human given name.
The internet shorthand for "Thanks, all done."
Tadcaster, a town in the United Kingdom.
TAD, the acronym for the Transportation Aging Disposal canister for nuclear waste that is planned to be shipped to the Yucca Mountain Project in Nevada.
TAD Corporation, a defunct video game developer.
A military acronym for "target acquisition detachment."
A military acronym (US Navy, Coast Guard) for "Temporary Additional Duty" order status, synonymous with the US Army status of TDY for "Temporary Duty", generally referring to an assignment away f
Source:
http://en.wikipedia.org/wiki/Tad