<s>
Lira	B-Device
512	I-Device
(	O
also	O
known	O
as	O
Lira	B-Device
XT	I-Device
)	O
was	O
an	O
IBM	B-Device
PC	I-Device
XT	I-Device
compatible	O
computer	O
made	O
by	O
the	O
Yugoslav	O
(	O
now	O
Serbian	O
)	O
company	O
EI	O
Niš	O
in	O
the	O
late	O
1980s	O
.	O
</s>
<s>
Soon	O
after	O
that	O
,	O
Lira	B-Device
512	I-Device
was	O
also	O
presented	O
in	O
Yugoslav	O
computer	O
press	O
.	O
</s>
<s>
What	O
separates	O
Lira	B-Device
512	I-Device
from	O
most	O
of	O
the	O
other	O
XT	O
compatibles	O
is	O
that	O
keyboard	O
is	O
included	O
just	O
above	O
in	O
the	O
same	O
case	O
(	O
together	O
with	O
the	O
3.5	O
’’	O
floppy	B-Device
drive	I-Device
)	O
,	O
which	O
made	O
it	O
similar	O
in	O
appearance	O
to	O
the	O
original	O
Atari	B-Device
ST	I-Device
or	O
the	O
Amiga	B-Device
500	I-Device
.	O
</s>
<s>
Lira	O
has	O
two	O
display	B-Device
adapters	O
(	O
monochrome	O
Hercules	B-Device
compatible	O
and	O
color	O
CGA	B-Device
compatible	O
)	O
,	O
where	O
the	O
active	O
video	O
adapter	O
is	O
chosen	O
by	O
the	O
back-panel	O
switch	O
.	O
</s>
<s>
The	O
main	O
purpose	O
of	O
Lira	B-Device
512	I-Device
was	O
to	O
be	O
used	O
in	O
computer	O
classrooms	O
.	O
</s>
<s>
Lira	B-Device
XT	I-Device
Tower	B-General_Concept
was	O
released	O
about	O
a	O
year	O
after	O
the	O
release	O
of	O
the	O
original	O
Lira	B-Device
512	I-Device
,	O
because	O
it	O
was	O
realized	O
that	O
512	O
's	O
compact	O
case	O
limits	O
hardware	O
expansion	O
.	O
</s>
<s>
To	O
address	O
this	O
issue	O
,	O
especially	O
to	O
allow	O
for	O
the	O
installation	O
of	O
the	O
hard	O
disk	O
,	O
the	O
case	O
was	O
changed	O
to	O
a	O
slimline	O
tower	B-General_Concept
.	O
</s>
<s>
About	O
the	O
same	O
time	O
with	O
Lira	B-Device
XT	I-Device
Tower	B-General_Concept
,	O
the	O
new	O
Lira	O
AT	O
was	O
released	O
with	O
similar	O
looking	O
slimline	O
tower	B-General_Concept
case	I-General_Concept
.	O
</s>
<s>
Lira	O
AT	O
was	O
compatible	O
with	O
IBM	B-Operating_System
PC	I-Operating_System
AT	I-Operating_System
and	O
it	O
was	O
equipped	O
with	O
Intel	B-General_Concept
80286	I-General_Concept
CPU	B-Device
,	O
1MB	O
of	O
RAM	B-Architecture
,	O
EGA	O
compatible	O
video	O
adapter	O
,	O
2x3.5	O
"	O
floppy	B-Device
drives	I-Device
and	O
40MB	O
hard	O
disk	O
.	O
</s>
<s>
In	O
1990	O
the	O
design	O
of	O
the	O
Lira	O
386	B-General_Concept
(	O
based	O
on	O
Intel	B-General_Concept
80386	I-General_Concept
CPU	B-Device
)	O
was	O
ready	O
for	O
production	O
.	O
</s>
