"One of the lines on my list of things I can do in order to make progress on my book is to move my Drupal development environment from Eclipse to Emacs, as immersion would no doubt give me plenty of things to tweak and describe. When you use something every day, you notice the rough edges. With Emacs, you can sand those edges down.

"...Emacs is a text editor. And it’s a lot more — sometimes too much. I know of a number of Emacs users who practically live in the editor. As I pointed out in a previous post, some users go a little overboard with the way in which they use Emacs — as a personal information manager, as a mail client, and even as a Web browser.

"If you've never been convinced before that Emacs is the text editor in which dreams are made from, or that inside Emacs there are unicorns manipulating your text, don't expect me to convince you [...] You see, Emacs isn't a text editor. Emacs is a programming language that you can use to write your own text editor..."

"EMACS(1) is a real-time display editor which can be extended by the user while it is running. Extensibility means that the user can add new editing commands or change old ones to fit his editing needs, while he is editing. EMACS is written in a modular fashion, composed of many separate and independent functions.

"...What’s really amazing is the wise Emacs internal architecture that allows those myriads of extensions to work together. Eclipse tries hard to achieve this, and the concept of plugin extension points is really similar to “hooks” in Emacs, but… But it’s almost impossible to write a useful Eclipse extension with just a few lines of Java code—too many low-level overhead.

[PDF] Dan Murphy: «...TECO continued to be heavily used and enhanced by the hackers in Minsky’s AI lab, eventually including Richard Stallman.In the early to mid-1970s, Stallman would make some key enhancements to TECO that allowed it to become a fully interactive, WYSIWYG-style onscreen editor [...] This became the origina

"...Emacs is an extensible, customizable, full-screen text editor. You can learn enough to be productive in Emacs in 30 minutes, but there is enough to learn about Emacs to keep you busy for years. The goal of this tutorial is to show you enough so that you are comfortable using Emacs as a work environment, not just as a text editor..."

"Emacs is a class of text editors that have an extensive set of features and that are popular with computer programmers and other technically proficient computer users. GNU Emacs, a part of the GNU project, is under active development and is the most popular version.

"GNU Emacs is much more than a word processor; over the years it has expanded into and entire workflow environment. Programmers are impressed by its integrated debugging and project management features. Emacs is also a multi-lingual word processor, can handle all your email and Usenet news needs, display web pages, and even has a diary and a calendar for your appointments.