What does TARDIS stand for?

What does TARDIS mean?

TARDIS	Apparatus For Really Distant Interstellar Sojourns Miscellaneous » Unclassified
TARDIS	The Apparatus for Really Distant Interstellar Sojourns Academic & Science » Astronomy
TARDIS	The Army 'Round Doncaster Is Stationary Miscellaneous » Funnies
TARDIS	Time And Relative Dimensions In Space Miscellaneous » Science Fiction
TARDIS	Time And Relative Dimensions In Space Academic & Science » Physics
TARDIS	Time And Relative Dimensions In Space Academic & Science » Astronomy
TARDIS	Time And Resource Distribution In Schools Community » Educational
TARDIS	Totally Awful Rotten Diatribe In Spelling Community » Educational
TARDIS	Tracking And Relative Direction Imbedded System Miscellaneous » Unclassified
TARDIS	Transporting Activities Round Districts In Swansea Miscellaneous » Unclassified

TARDIS(ProperNoun): Time And Relative Dimension In Space; a fictional time machine and spacecraft, disguised in the form of a British police box, used by the Doctor in the British sci-fi television series Doctor Who.