Microsoft's spreadsheet program can do way more than you might realize. These are the hacks and tricks you need to know.

Apple's Numbers spreadsheet for Mac, iPhone, and iPad, is not as powerful as Microsoft Excel, but most users will be ...

New York Times has built a reputation for producing Internet puzzles that players find instantly addictive while also being unusually elegant in their ...

A Freyd category consists of two categories C and K with an identity-on-objects functor J: C → K, where: - C has finite products - K is symmetric premonoidal (with a functor ⊗ z ) - J maps finite ...