<s>
E	B-Application
is	O
a	O
text	B-Application
editor	I-Application
originally	O
developed	O
at	O
the	O
Stanford	O
AI	O
Lab	O
in	O
the	O
1970s	O
for	O
the	O
WAITS	B-Application
operating	O
system	O
.	O
</s>
<s>
E	B-Application
was	O
one	O
of	O
the	O
first	O
WYSIWYG	B-Application
editors	I-Application
.	O
</s>
<s>
Carl	O
Mikkelsen	O
had	O
previously	O
implemented	O
a	O
similar	O
hack	O
to	O
the	O
TECO	B-Application
text	B-Application
editor	I-Application
,	O
adding	O
a	O
combined	O
display+editing	O
mode	O
called	O
"	O
Control-R	O
"	O
.	O
</s>
