<s>
KeyRus	B-Application
was	O
a	O
DOS-based	O
TSR	O
device	B-Application
driver	I-Application
for	O
keyboard	O
and	O
display	O
,	O
written	O
by	O
the	O
Donetsk	O
student	O
and	O
hacker	O
in	O
1989	O
.	O
</s>
<s>
The	O
last	O
version	O
of	O
KeyRus	B-Application
was	O
released	O
in	O
1994	O
,	O
not	O
long	O
before	O
Gurtyak	O
suddenly	O
died	O
.	O
</s>
<s>
KeyRus	B-Application
was	O
distributed	O
primarily	O
via	O
electronic	B-Application
bulletin	I-Application
boards	I-Application
and	O
Nikolai	O
Bezroukov	O
's	O
Softpanorama	O
electronic	O
magazine	O
.	O
</s>
<s>
It	O
loaded	O
fonts	O
into	O
the	O
EGA/VGA	O
and	O
supported	O
changes	O
to	O
be	O
keyboard	O
layout	O
.	O
</s>
<s>
Later	O
versions	O
of	O
KeyRus	B-Application
utilized	O
an	O
original	O
font	O
compression	O
technique	O
-	O
the	O
bitmaps	O
were	O
stored	O
in	O
memory	O
being	O
packed	O
and	O
unpacked	O
just	O
before	O
loading	O
into	O
the	O
graphics	O
adapter	O
.	O
</s>
<s>
This	O
allowed	O
KeyRus	B-Application
to	O
occupy	O
a	O
minimum	O
of	O
the	O
limited	O
DOS	B-General_Concept
memory	I-General_Concept
space	O
.	O
</s>
