National Semiconductor Novus 4510 Mathematician from 1976

[Steve Simpkin]

(03-11-2015 05:50 AM)bshoring Wrote:  Does this have the 3 level stack ?

This was my first RPN machine until I bought my HP-25. You could work around the 3-level stack by using the memory register when needed but the biggest limitation for me was the lack of scientific notation.