Apple has removed the old 13-inch MacBook Pro with Function Keys from its online store. As well as bringing the Touch Bar to every model in the range, though, it's made many other significant changes.

Function keys, or F-keys, are special-purpose keys on a keyboard that allow you to perform certain actions on your computer quickly. These keys comprise the top row of keyboards and are labeled F1 ...

The Fn key is short for function – this particular key allows PC users to access the second assignment of a key. It is normally found at the bottom left corner. The Function keys (F1, F2, etc) are ...