Answer | Crossword Clue |
---|---|
ABACUS | Ancestor of a calculator |
SLIDERULE | Calculator ancestor |
ABACUS | Calculator of a sort |
ABACUS | Calculator of a kind |
PASCAL | Inventor of a 17th-century calculator |
keypad | separate section on some computer keyboards, grouping together numeric keys and those for mathematical or other special functions in an arrangement like that of a calculator |