The calculator was successful and was followed by several improved models. The MITS 1440 calculator was featured in the July 1973 issues of Radio-Electronics. It had a 14-digit display, memory, and square root function. The kit sold for and the assembled version was . The cover story is for the MITS 1700 waveform generator. An ad for the MITS 1200, a battery operated handheld calculator, is on page 15. MITS later developed a programmer unit that would connect to the 816 or 1440 calculator and allow programs of up to 256 steps.
the calculator was successful and was followed by several improved models the mits 1440 calculator was featured in the july 1973 issues of radio-electronics it had a 14-digit display memory and square root function the kit sold for and the assembled version was  the cover story is for the mits 1700 waveform generator an ad for the mits 1200 a battery operated handheld calculator is on page 15 mits later developed a programmer unit that would connect to the 816 or 1440 calculator and allow programs of up to 256 steps