APH has a long history of collaborating with commercial electronics manufacturers to adapt their consumer products for our more specialized market. It should come as no surprise that developing electronics from scratch is an expensive and time consuming enterprise. By adapting already popular consumer models, our technical research folks cut years off the time it might take to bring a product to market. For a modern example of this, see the Orion TI-84 Talking Graphing Calculator.
For a time, APH also issued educational programs recorded on reel-to-reel tapes. The REAL Program (Recorded Educational Aids to Learning) ran from 1955-1977.