<s>
uNETix	B-Operating_System
is	O
an	O
early	O
implementation	O
of	O
UNIX	B-Application
for	O
IBM	B-Device
PC	I-Device
systems	O
.	O
</s>
<s>
It	O
was	O
not	O
a	O
"	O
true	O
"	O
UNIX	B-Application
,	O
but	O
was	O
written	O
from	O
scratch	O
for	O
the	O
PC	O
without	O
using	O
any	O
code	O
from	O
System	B-Operating_System
V	I-Operating_System
.	O
</s>
<s>
uNETix	B-Operating_System
only	O
supported	O
a	O
single	O
user	O
.	O
</s>
<s>
However	O
,	O
it	O
maintained	O
closer	O
compatibility	O
with	O
standard	O
versions	O
of	O
UNIX	B-Application
than	O
early	O
versions	O
of	O
QNX	B-Operating_System
.	O
</s>
<s>
uNETix	B-Operating_System
 '	O
multiple	O
windows	O
capability	O
was	O
possibly	O
the	O
first	O
implementation	O
of	O
windowing	O
in	O
a	O
Unix-like	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
.	O
</s>
<s>
Published	O
by	O
Lantech	O
Systems	O
,	O
Inc	O
,	O
uNETix	B-Operating_System
had	O
a	O
list	O
price	O
in	O
1984	O
of	O
130	O
USD	O
,	O
but	O
was	O
discounted	O
and	O
advertised	O
at	O
99	O
USD	O
(	O
USD	O
today	O
)	O
.	O
</s>
<s>
The	O
minimum	O
RAM	O
requirement	O
was	O
256	O
kB	O
,	O
but	O
a	O
machine	O
would	O
only	O
be	O
able	O
to	O
support	O
single-tasking	O
;	O
multitasking	B-Operating_System
required	O
512	O
kB	O
.	O
</s>
<s>
It	O
had	O
an	O
emulation	O
environment	O
for	O
MS-DOS	B-Application
that	O
could	O
run	O
DOS	O
1.1	O
programs	O
in	O
one	O
window	O
while	O
UNIX	B-Application
programs	O
ran	O
in	O
other	O
windows	O
.	O
</s>
<s>
Its	O
major	O
weaknesses	O
were	O
slow	O
speed	O
and	O
lack	O
of	O
hard	B-Device
disk	I-Device
support	O
.	O
</s>
<s>
uNETix	B-Operating_System
came	O
with	O
a	O
full	O
assembly	B-Language
language	I-Language
programming	O
environment	O
,	O
and	O
a	O
C	O
compiler	O
was	O
optional	O
.	O
</s>
<s>
Lantech	O
claimed	O
that	O
the	O
C	O
compiler	O
was	O
the	O
first	O
available	O
for	O
the	O
x86	B-Operating_System
architecture	I-Operating_System
.	O
</s>
