<s>
The	O
Gemini	B-Device
Challenger	I-Device
was	O
a	O
Motorola	B-Device
68000	I-Device
based	O
computer	O
,	O
released	O
in	O
1985	O
and	O
designed	O
by	O
Gemini	O
Microcomputers	B-Architecture
based	O
in	O
Chesham	O
.	O
</s>
<s>
This	O
was	O
Gemini	O
's	O
first	O
non	O
Z80	B-General_Concept
computer	O
and	O
their	O
last	O
.	O
</s>
<s>
Four	O
operating	O
systems	O
were	O
available	O
(	O
MBOS	O
,	O
aimed	O
for	O
business	O
and	O
supporting	O
multiuser	O
;	O
Mirage	O
,	O
another	O
multiuser	O
OS	O
;	O
TDI	O
p-System	B-Language
,	O
a	O
version	O
of	O
UCSD	B-Language
p-System	I-Language
including	O
Pascal	B-Application
;	O
CP/M	B-Application
68k	I-Application
)	O
,	O
along	O
with	O
an	O
advanced	O
optional	O
graphic	O
card	O
(	O
based	O
on	O
the	O
Hitachi	O
HD63484	O
)	O
with	O
a	O
maximum	O
resolution	O
of	O
1024	O
x	O
1024	O
pixels	O
and	O
16	O
million	O
available	O
colours	O
.	O
</s>
