TEE-AGE-EX both for film and the sound-system standard.

Within the film the characters Duvall, Pleasence and McOmie play seems to most often go with the less formal THEX or LUH instead of EL-YOU-AGE etc. Which I think is a simple but nice little detail that gives it humanity, the characters themselves think of each other as human beings in comparison to the machine they live in where they are just seen as mere numbers and letters in the system. Not much different to the world we live in. ;)