<s>
ChiWriter	B-Application
is	O
a	O
commercial	O
scientific	O
text	B-Application
editor	I-Application
for	O
MS-DOS	B-Application
,	O
created	O
by	O
Cay	O
Horstmann	O
in	O
1986	O
.	O
</s>
<s>
It	O
was	O
one	O
of	O
the	O
first	O
WYSIWYG	B-Application
editors	I-Application
that	O
could	O
write	O
mathematical	O
formulæ	O
,	O
even	O
on	O
IBM	B-Device
PC	I-Device
XT	I-Device
computers	O
that	O
were	O
then	O
common	O
.	O
</s>
<s>
The	O
editor	O
was	O
more	O
oriented	O
to	O
speed	O
and	O
interactive	O
aspect	O
of	O
editing	O
,	O
rather	O
than	O
on	O
visual	O
appearance	O
of	O
the	O
result	O
,	O
therefore	O
,	O
it	O
has	O
its	O
own	O
graphical	B-Application
user	I-Application
interface	I-Application
with	O
bitmap	O
fonts	O
of	O
fixed	O
width	O
.	O
</s>
<s>
Although	O
popular	O
(	O
easier	O
to	O
use	O
than	O
TeX	B-Application
for	O
many	O
scientists	O
)	O
,	O
this	O
led	O
to	O
its	O
demise	O
as	O
more	O
text	B-Application
editors	I-Application
with	O
vector	O
fonts	O
for	O
Microsoft	B-Application
Windows	I-Application
began	O
to	O
appear	O
,	O
and	O
in	O
1996	O
,	O
it	O
has	O
been	O
discontinued	O
.	O
</s>
<s>
The	O
basic	O
idea	O
of	O
ChiWriter	B-Application
is	O
that	O
a	O
user	O
can	O
add	O
lines	O
above	O
or	O
below	O
the	O
current	O
text	O
line	O
(	O
by	O
half	O
of	O
the	O
base	O
line	O
height	O
)	O
,	O
and	O
write	O
text	O
there	O
too	O
.	O
</s>
<s>
Combined	O
with	O
the	O
possibility	O
to	O
use	O
several	O
fonts	O
(	O
up	O
to	O
20	O
)	O
at	O
once	O
,	O
such	O
as	O
Greek	O
alphabet	O
,	O
Cyrillic	O
alphabets	O
,	O
and	O
mathematical	O
and	O
other	O
symbols	O
,	O
ChiWriter	B-Application
is	O
quite	O
easy	O
to	O
write	O
mathematical	O
texts	O
in	O
.	O
</s>
<s>
Recently	O
people	O
experience	O
some	O
difficulty	O
with	O
exhibiting	O
ChiWriter	B-Application
documents	O
.	O
</s>
<s>
A	O
simple	O
solution	O
takes	O
into	O
consideration	O
the	O
fact	O
that	O
in	O
the	O
quality	O
printing	O
mode	O
ChiWriter	B-Application
outputs	O
bit-image	O
print	O
codes	O
which	O
can	O
be	O
redirected	O
into	O
a	O
file	O
(	O
default	O
extension	O
.bin	O
)	O
.	O
</s>
<s>
In	O
the	O
heydays	O
of	O
the	O
editor	O
,	O
the	O
codes	O
Epson	B-Language
ESC/P	I-Language
were	O
the	O
most	O
frequently	O
used	O
.	O
</s>
<s>
Utility	O
converts	O
used	O
by	O
ChiWriter	B-Application
subset	O
of	O
bit-image	O
print	O
codes	O
into	O
a	O
file	O
Portable	O
anymap	O
(	O
.pbm	O
)	O
which	O
is	O
loaded	O
by	O
many	O
graphical	O
utilities	O
.	O
</s>
<s>
For	O
example	O
,	O
utility	O
GIMP	B-Application
allows	O
saving	O
a	O
page	O
afterwards	O
in	O
Portable	B-Application
Document	I-Application
Format	I-Application
(	O
.pdf	B-Application
)	O
.	O
</s>
<s>
It	O
is	O
still	O
possible	O
to	O
run	O
the	O
application	O
on	O
modern	O
computers	O
,	O
using	O
DOS	O
virtualization	O
software	O
,	O
like	O
VirtualBox	B-Operating_System
or	O
DosBox	B-Application
.	O
</s>
<s>
This	O
allows	O
to	O
convert	O
the	O
documents	O
into	O
the	O
PostScript	B-Language
format	O
(	O
.ps	O
)	O
,	O
using	O
the	O
provided	O
PostScript	B-Language
printer	O
driver	O
.	O
</s>
<s>
PostScript	B-Language
format	O
can	O
be	O
directly	O
converted	O
into	O
Portable	B-Application
Document	I-Application
Format	I-Application
(	O
.pdf	B-Application
)	O
format	O
.	O
</s>
