Those of you with an interest in microcomputer history will know that there is a strong crossover between the path of electronic calculator evolution and the genesis of the integrated CPU.

When Haggerty conceived of the idea in 1965, calculators were heavy and took up significant space on a desktop, so perhaps the convenience of one which you could carry around played a part.

Tip calculators can make the process easier. With Tip N Split, it's easy to determine gratuity quickly and easily split the bill among fellow diners. If you want to round up or round down on the ...