Block Transfer Computations were mathematical formulae to create objects and in other ways affect spacetime by the power of mathematic formulae themselves.
The Monitor, leader of the Logopolitans, explained that computers apparently cannot use Block Transfer Computations as the calculations themselves would alter the nature of the computer. Therefore, organic life forms must do the work. The Monitor's people spoke their computations aloud, for unknown reasons. (DW: Logopolis)
- The organic computer known as the Pool utilized Block Transfer Computations, which may contradict his statement.
Block Transfer Computations could create or re-create any object or spacetime event, provided enough mathematical information was supplied. (DW: Logopolis) The Computations can also re-create or even duplicate people. Adric, imprisoned by the Master in a hadron web, created an entire city, full of people. (DW: Castrovalva)
Others who have used Block Transfer Computations include the the Logopolitans, mentioned before, who used Block Transfer Computations to create a duplicate of the Pharos Project to maintain the CVEs which prevented entropy from destroying the universe. (DW: Logopolis). The Pool used Block Transfer Computation to create defenses for itself and to create horrific imagery. (NA: Deceit). The Time Lords have all used Block Transfer Computations to create duplicates of the Eye of Harmony in order to power Gallifreyan timecraft (PDA: The Quantum Archangel).