 An Altair equipped with a VDM-1 for output and their P3+S card running a keyboard for input removed the need for a terminal, yet cost less than dedicated smart terminal products like the Hazeltine.Before the VDM-1 was launched in late 1975, the only way to program the Altair was through its front-panel switches and LED lamps, or by purchasing a serial card and using a terminal of some sort.This was typically a Model 33, which still cost $1,500 if available.