function) Command can be link to keyboard-shortcut For example C t r l - x C t r l - s will execute s a v e - b u f f e r Abbreviated to C - x C - s . Other keys: M e t a (A l t ) -> M Search and execute using M - x (e.g M - x s e a r c h - f o r w a r d )
Syntax highlighting Keyboard shortcut Autocompletion / Snippets Interaction with the Text Divided into major and minor modes 1 major mode and many minor modes. e.g. p y t h o n - m o d e is a m a j o r mode and f l y m a k e and p r o j e c t i l e are minor modes.
Perl, Bash Store small script Create Notebooks for any technology. The Babel Fish is small, yellow, and simultaneously translates from one spoken language to another. – The Hitchhiker's Guide to the Galaxy, Douglas Adams