IBM bundled it in with OS/2 Warp.  I forget if the edlin was a family API app.

Now that edlin is MIT licensed I guess it may live on

Sent from my Windows 10 Nokia Lumia 1520

From: Steve Nickolas
Sent: Sunday, 7 October 2018 8:56 PM
To: Donald ODona
Cc: tuhs@tuhs.org
Subject: Re: [TUHS] Software Archeology: QED

On Sun, 7 Oct 2018, Donald ODona wrote:

> At 7 Oct 2018 11:01:11 +0000 (+00:00) from Arrigo Triulzi <a target="_blank"rrigo@alchemistowl.org>:
>> What was the name of the editor which George Coulouris wrote at Queen Mary College (then Queen Mary and Westfield, now Queen Mary, University of London)? “e”?
> em.
> http://pgas.freeshell.org/C/em/
>
>> Arrigo
>

When I think of "e", I think of IBM's text editor, which I had on one of 
my XTs before it became part of PC DOS 6.1.

-uso.