<s>
DEC	B-Application
SED	I-Application
was	O
a	O
multiplatform	B-Operating_System
text	O
editor	O
for	O
TOPS-10	B-Operating_System
,	O
TOPS-20	B-Operating_System
and	O
VMS	B-Operating_System
written	O
in	O
the	O
early	O
1980s	O
by	O
A	O
.	O
Christopher	O
Hall	O
.	O
</s>
