<s>
Language-Sensitive	B-Application
Editor	I-Application
(	O
LSE	O
)	O
is	O
a	O
full-screen	O
visual	B-Application
editor	I-Application
for	O
the	O
VAX/VMS	B-Operating_System
and	O
OpenVMS	B-Operating_System
Operating	B-General_Concept
systems	I-General_Concept
.	O
</s>
<s>
LSE	O
is	O
implemented	O
by	O
using	O
the	O
Text	B-Language
Processing	I-Language
Utility	I-Language
(	O
TPU	O
)	O
language	O
.	O
</s>
<s>
It	O
is	O
part	O
of	O
the	O
DECset	O
programming	B-Application
tool	I-Application
set	O
,	O
which	O
also	O
contains	O
a	O
test	O
manager	O
,	O
the	O
performance	O
and	O
coverage	O
analyzer	O
(	O
PCA	O
)	O
,	O
a	O
code	O
management	O
system	O
(	O
CMS	O
)	O
,	O
and	O
a	O
module	O
management	O
mystem	O
(	O
MMS	O
)	O
.	O
</s>
<s>
LSE	O
requires	O
the	O
features	O
of	O
a	O
VT100	B-Device
terminal	O
and	O
successors	O
,	O
or	O
a	O
compatible	O
terminal	B-Application
emulator	I-Application
.	O
</s>
<s>
EDT	B-Application
keypad	O
layout	O
default	O
.	O
</s>
