Commodore infamously used TI chips in their calculators too, leading to the situation where Jack Tramiel was getting massively undercut by TI using the same chips in their own TI calculators for less. Buying the ailing MOS Technology gave him the vertical integration he wanted and enabled him to force TI out of the home computer market only a few years later. Revenge is such a dirty word.

Now we just need that one cool article about the Sinclair Scientific Calculator. It was a scientific calculator that was made to run on an underpowered chip intended for regular four-function calculators.