TOMTIT
TOMTIT is an acronym for Transmission Of Matter Through Interstitial Time, and was created by Stuart Hyde, Dr. Ruth Ingram and Professor Thascales (an alias of The Master).
TOMTIT could break down solid objects into light waves and transmit them from one place to another (much in the same way a teleport or transmat works. (DW: The Time Monster)
The Master altered TOMTIT to act as a time travel device (much like a Time scoop) and pick up elements of Earth's battle history to fight against UNIT when they attempted to remove him from his base of operations. (DW: The Time Monster)
Years later Stuart Hyde utilised TOMTIT in the TITAN Array. (PDA: The Quantum Archangel)