T-Mat

Travel Mat (T-Mat for short), acted as an instantaneous transport system. By the late 21st century, T-Mat cubicles linked the entire Earth and served as a means of transporting goods all over the globe.

As a result of this convenient form of travel, space travel and exploration were neglected making rockets and other spaceships things of the past. T-Mat Control was on Earth and a base on the Moon, connected to each other by T-Mat network, which coordinated the whole network. The Ice Warriors sought to exploit this when they took over the moonbase in preparation to invade Earth.(DW: The Seeds of Death)


 * The distinction, other then the name, between transmat and T-mat remains unknown. It is likely that "T-Mat" is a brand name for a transmat, just as Xerox is a brand name for photocopying.