Prof. William Kahan describes his work on HP’s celebrated line of programmable calculators, squeezing highly efficient solve, integrate, and matrix functions into their severely limited hardware capabilities.
Video of the full interview - and much more - on Kahan’s ACM profile (IEEE floating point, the 8087, the FERUT, a Mark I in Canada.)
All of the above available as a (200 page!) oral history, here.
via J F Garnier at the hpmuseum.
See also previous posts:
William Kahan on the design of the 8087 FPU