 The telescope has an alt-azimuth mount sitting on 54 steel rollers in a 42 ft (12.8 m) diameter roller track on top of a foundation block.It was the first telescope in the world to be steered by a digital computer.This computer, the Ferranti "Argus" 104, had 12 kilobytes of memory; it was upgraded to an Argus 400 in 1971, with the 104 being put to use controlling the upgraded Lovell Telescope.