<s>
Elwro	O
was	O
a	O
Polish	O
company	O
that	O
manufactured	O
mainframe	B-Architecture
and	O
microcomputers	B-Architecture
from	O
1959	O
until	O
1989	O
.	O
</s>
<s>
Computer	O
models	O
included	O
Odra	B-Device
mainframe	B-Architecture
systems	O
,	O
and	O
the	O
Elwro	O
800	O
Junior	O
microcomputer	B-Architecture
for	O
education	O
.	O
</s>
<s>
The	O
first	O
model	O
designed	O
at	O
this	O
plant	O
was	O
the	O
vacuum-tube	O
based	O
Odra	B-Device
1001	O
,	O
released	O
in	O
December	O
1960	O
;	O
this	O
was	O
a	O
research	O
computer	O
not	O
put	O
into	O
serial	O
production	O
.	O
</s>
<s>
The	O
next	O
model	O
was	O
the	O
Odra	B-Device
1002	O
which	O
was	O
constructed	O
from	O
transistors	O
made	O
in	O
Poland	O
,	O
in	O
1962	O
.	O
</s>
<s>
The	O
Elwro	O
factory	O
was	O
responsible	O
for	O
mass	O
production	O
of	O
the	O
tube-based	O
UMC-1	B-Device
designed	O
at	O
Warsaw	O
University	O
of	O
Technology	O
;	O
twenty-five	O
units	O
were	O
built	O
from	O
1962	O
through	O
1965	O
.	O
</s>
<s>
Concurrently	O
,	O
design	O
work	O
was	O
proceeding	O
on	O
the	O
Odra	B-Device
1003	O
transistor	O
computer	O
,	O
which	O
was	O
faster	O
than	O
the	O
UMC-1	B-Device
,	O
and	O
used	O
much	O
less	O
power	O
.	O
</s>
<s>
In	O
1966	O
,	O
the	O
Odra	B-Device
1204	O
was	O
built	O
,	O
with	O
16	O
k	O
words	O
of	O
magnetic	O
core	O
memory	O
and	O
a	O
130	O
k	O
word	O
drum	O
.	O
</s>
<s>
However	O
,	O
software	O
production	O
was	O
a	O
bottleneck	O
and	O
the	O
company	O
was	O
directed	O
to	O
produce	O
a	O
computer	O
compatible	O
with	O
the	O
ICL	B-Device
1900	I-Device
;	O
this	O
"	O
compatible	O
"	O
machine	O
was	O
the	O
Odra	B-Device
1304	O
.	O
</s>
<s>
The	O
Odra	B-Device
1305	O
used	O
integrated	O
circuits	O
and	O
began	O
production	O
in	O
1970	O
;	O
it	O
had	O
one	O
million	O
bytes	O
of	O
main	O
memory	O
and	O
disk	O
drives	O
to	O
store	O
100	O
million	O
bytes	O
.	O
</s>
<s>
The	O
1325	O
became	O
popular	O
because	O
it	O
supported	O
common	O
programming	O
languages	O
of	O
the	O
time	O
such	O
as	O
ALGOL	B-Language
,	O
COBOL	B-Application
and	O
FORTRAN	B-Application
.	O
</s>
<s>
From	O
1985	O
to	O
1990	O
Elwro	O
produced	O
the	O
Elwro	O
800	O
Junior	O
microcomputer	B-Architecture
for	O
education	O
.	O
</s>
<s>
In	O
2015	O
the	O
Wrocław	O
city	O
council	O
named	O
the	O
former	O
location	O
of	O
the	O
factory	O
,	O
ELWRO	O
Square	O
,	O
to	O
commemorate	O
the	O
company	O
's	O
contributions	O
to	O
information	B-General_Concept
technology	I-General_Concept
.	O
</s>
