<s>
Expensive	B-Application
Typewriter	I-Application
was	O
a	O
pioneering	O
text	B-Application
editor	I-Application
program	O
that	O
ran	O
on	O
the	O
DEC	B-Device
PDP-1	I-Device
computer	O
which	O
had	O
been	O
delivered	O
to	O
MIT	O
in	O
the	O
early	O
1960s	O
.	O
</s>
<s>
Since	O
the	O
program	O
could	O
drive	O
an	O
IBM	O
Selectric	O
typewriter	O
(	O
a	O
letter-quality	O
printer	O
)	O
,	O
it	O
may	O
be	O
considered	O
the	O
first	O
word	B-General_Concept
processing	I-General_Concept
software	O
.	O
</s>
<s>
In	O
the	O
spirit	O
of	O
an	O
earlier	O
editor	O
program	O
,	O
named	O
"	O
Colossal	B-Application
Typewriter	I-Application
"	O
,	O
it	O
was	O
called	O
"	O
Expensive	B-Application
Typewriter	I-Application
"	O
because	O
at	O
that	O
time	O
the	O
PDP-1	B-Device
cost	O
a	O
lot	O
of	O
money	O
(	O
approximately	O
)	O
as	O
compared	O
to	O
a	O
conventional	O
manual	O
typewriter	O
.	O
</s>
