<s>
In	O
information	B-General_Concept
technology	I-General_Concept
,	O
Questar	O
computer	B-General_Concept
terminals	I-General_Concept
are	O
a	O
line	O
of	O
largely	O
3270-compatible	B-Operating_System
text-only	O
dumb	O
terminals	O
manufactured	O
by	O
Groupe	O
Bull	O
and	O
widely	O
used	O
in	O
France	O
and	O
some	O
other	O
markets	O
.	O
</s>
<s>
The	O
terminals	O
combine	O
standard	O
3270	B-Operating_System
emulation	O
with	O
a	O
number	O
of	O
Questar-specific	O
features	O
.	O
</s>
<s>
The	O
terminals	O
have	O
been	O
most	O
successful	O
with	O
users	O
who	O
already	O
operate	O
compatible	O
Bull	O
mainframe	O
systems	O
,	O
and	O
have	O
achieved	O
far	O
less	O
market	O
penetration	O
as	O
plug-compatible	B-Device
replacements	O
for	O
IBM	B-Operating_System
3270	I-Operating_System
terminals	O
.	O
</s>
<s>
The	O
Bull	B-General_Concept
Questar	I-General_Concept
400	O
was	O
a	O
licensed	O
version	O
of	O
the	O
Convergent	O
Technologies	O
NGEN	O
.	O
</s>
<s>
However	O
there	O
was	O
Bull	B-General_Concept
Questar	I-General_Concept
M	O
,	O
in	O
fact	O
Micral	B-Device
series	O
80	O
.	O
</s>
