Computers in working order and with correct software don’t make mistakes. People, however, make plenty of mistakes (including writing bad software or breaking computers). In quality circles, there’s a ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

A numeric digit used to ensure that account numbers are entered accurately into the computer. Check digits are computed when the numbers are generated, and they become part of the number, often at the ...