Radio Electronics December 1970 National Radio Institute's ( NRI ) full-page advertisement for their Model 832 digital computer trainer. The ad appeared in electronics magazines through 1972. Click image for larger view.

The 1970 NRI Digital Computer Model 832 was a trainer kit that was developed in 1970 and sold for $504 US when first introduced. It pre-dates the similar Kenbak computer by many months. Click image for larger view.

The 832 had a rudimentary instruction set, speed control and a switch register. Click image for larger view.

Here is a closeup of the memory switch bank. Click image for larger view.