Whether you’re typing an email in your browser or writing in a word processor, there are convenient keyboard shortcuts usable in almost every application. You can copy, select, or delete entire words or paragraphs with just a few key presses.
Some applications may not support a few of these shortcuts, but most applications support the majority of them. Many are built into the standard text-editing fields on Windows and other operating systems.
Convenient keyboard shortcuts : http://goo.gl/VYRDo