QMC Unix Manual 1

Stern Hall

em and ded Text Editors from the
Stern Hall Computer Science Lab

updated on 2014-07-20


Introduction
Faces and Names
Unix Manuals
Hardware
Text Terminal
em & ded Text Editors
Links and Stuff


The first standard Unix text editor that we used was ed which was based on QED, see also An incomplete history of the QED Text Editor. William Newman had already written a version of QED for our older Interdata/MIFS computer systems.

The two new text editors created at QMC were em and ded. The vi editor, partially derived from em, came later from UC Berkeley.


em Text Editor

Let George tell you about em in em and Unix. He also wrote a ten-page An introduction to the QMC Unix Editor – 'em' in the QMC Unix Papers. Here is the em manual page.   You can click on any image to view it full size.

QMC em Unix Editor Introduction – 1 of 10 QMC em Unix Editor Introduction
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ded Text Display Editor

Let Richard tell you about ded in this PDF The life and times of ded, text display editor. Jon Rowson wrote a 19-page introduction to ded and em in the QMC Unix Papers. This full-screen display editor needed a so-called Visual Display Unit such as the ITT 3210 VDU Terminal and the Hazeltine 1510 VDU Terminal.   You can click on any image to view it full size.

QMC ded Unix Editor Introduction – 1 of 19 QMC Unix Text Editors
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page 11 – em
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vi Text Display Editor

Having used ded I was not impressed when I used vi for the first time at Bell Labs. I suppose one never forgets how to use the first editor that one has mastered; I can and do use ed from time to time, especially in shell scripts. So excuse me when I say in the year 2013 that there are two things that you need to know about vi (and emacs):

  1. vi is a disease
  2. how to get out of vi if you accidentally fall into it
  3. vi is a disease
  4. vi is a disease

Note for Betonköpfe the use of vi, vim or vile is inexcusable.




em and ded Text Editors from the
Stern Hall Computer Science Lab


Introduction
Faces and Names
Unix Manuals
Hardware
Text Terminal
em & ded Text Editors
Links and Stuff
Top