Most people take operating system size for granted — until the moment it matters. Maybe you have a decade-old machine collecting dust in a corner, and you're hoping you'll find an operating system ...

Real operating systems on a tiny microcontroller.

When I was introduced to the original Macintosh early in 1984, I looked at the device on the table in front of me with a sense of wonder. It wasn’t because I was blown away by the technical innovation ...