<s>
Dr.	B-Application
Halo	I-Application
is	O
a	O
raster	B-Application
graphics	I-Application
editor	I-Application
developed	O
by	O
Media	O
Cybernetics	O
and	O
released	O
for	O
computers	O
running	O
MS-DOS	B-Application
.	O
</s>
<s>
It	O
was	O
among	O
the	O
first	O
graphics	O
editors	O
available	O
for	O
MS-DOS	B-Application
with	O
its	O
initial	O
release	O
in	O
1984	O
.	O
</s>
<s>
Media	O
Cybernetics	O
boasted	O
about	O
three	O
million	O
users	O
of	O
Dr.	B-Application
Halo	I-Application
between	O
1984	O
and	O
1993	O
.	O
</s>
<s>
Contemporary	O
computer	O
journalists	O
compared	O
the	O
initial	O
release	O
of	O
Dr.	B-Application
Halo	I-Application
's	O
interface	O
to	O
that	O
of	O
MacPaint	B-Operating_System
while	O
calling	O
it	O
more	O
feature-packed	O
than	O
either	O
MacPaint	B-Operating_System
or	O
the	O
competing	O
MS-DOS	B-Application
graphic	O
editor	O
PC	B-Application
Paintbrush	I-Application
.	O
</s>
<s>
Like	O
MacPaint	B-Operating_System
,	O
Dr.	B-Application
Halo	I-Application
allows	O
users	O
to	O
select	O
different	O
drawing	O
tools	O
by	O
way	O
of	O
a	O
toolbox	O
on	O
the	O
left	O
side	O
of	O
the	O
screen	O
.	O
</s>
<s>
A	O
palette	O
showing	O
the	O
available	O
patterns	O
and	O
colors	O
are	O
shown	O
at	O
the	O
bottom	O
of	O
the	O
screen	O
when	O
Dr.	B-Application
Halo	I-Application
is	O
first	O
started	O
.	O
</s>
<s>
Unlike	O
MacPaint	B-Operating_System
,	O
Dr.	B-Application
Halo	I-Application
eschews	O
drop-down	O
menus	O
for	O
a	O
given	O
tool	O
's	O
secondary	O
options	O
,	O
in	O
favor	O
of	O
an	O
overlapping	O
menu	O
prompted	O
by	O
a	O
right	O
click	O
over	O
said	O
tool	O
.	O
</s>
<s>
Also	O
,	O
unlike	O
PC	B-Application
Paintbrush	I-Application
,	O
when	O
the	O
initial	O
release	O
of	O
Dr.	B-Application
Halo	I-Application
is	O
first	O
started	O
it	O
displays	O
the	O
last	O
saved	O
drawing	O
along	O
with	O
its	O
associated	O
color	O
and	O
pattern	O
palettes	O
.	O
</s>
<s>
The	O
first	O
release	O
of	O
Dr.	B-Application
Halo	I-Application
came	O
packaged	O
with	O
Multiboard	O
Grab	O
,	O
a	O
utility	O
for	O
making	O
slide	O
shows	O
from	O
Dr.	B-Application
Halo	I-Application
drawing	O
files	O
,	O
as	O
well	O
as	O
another	O
utility	O
for	O
converting	O
drawing	O
files	O
from	O
other	O
programs	O
—	O
such	O
as	O
Lotus-generated	O
charts	O
—	O
for	O
use	O
with	O
Dr.	B-Application
Halo	I-Application
or	O
the	O
slide	O
show	O
utility	O
.	O
</s>
<s>
In	O
addition	O
to	O
extending	O
support	O
to	O
then-new	O
peripherals	O
and	O
devices	O
such	O
as	O
graphics	O
cards	O
,	O
printers	O
,	O
and	O
pointing	O
devices	O
,	O
Dr.	B-Application
Halo	I-Application
II	O
introduced	O
a	O
"	O
virtual	O
page	O
"	O
function	O
which	O
allowed	O
users	O
to	O
take	O
ASCII-encoded	O
text	O
files	O
and	O
import	O
them	O
into	O
Dr.	B-Application
Halo	I-Application
,	O
with	O
options	O
to	O
lay	O
out	O
the	O
text	O
and	O
set	O
the	O
text	O
's	O
type	O
.	O
</s>
<s>
Dr.	B-Application
Halo	I-Application
II	O
also	O
added	O
undoing	O
,	O
graphics	O
scaling	O
,	O
and	O
a	O
"	O
smart	O
eraser	O
"	O
tool	O
that	O
allows	O
users	O
to	O
selectively	O
replace	O
a	O
certain	O
color	O
used	O
in	O
a	O
drawing	O
.	O
</s>
<s>
Alongside	O
Dr.	B-Application
Halo	I-Application
II	O
,	O
Media	O
Cybernetics	O
developed	O
the	O
Dr.	B-Application
Halo	I-Application
Desktop	O
Publishing	O
Editor	O
,	O
or	O
Dr.	B-Application
Halo	I-Application
DPE	O
.	O
</s>
<s>
The	O
company	O
touted	O
Dr.	B-Application
Halo	I-Application
DPE	O
as	O
a	O
desktop	O
publishing	O
package	O
.	O
</s>
<s>
In	O
reality	O
,	O
it	O
,	O
like	O
Dr.	B-Application
Halo	I-Application
II	O
,	O
was	O
a	O
raster	B-Application
editor	I-Application
that	O
shared	O
the	O
former	O
's	O
ability	O
to	O
import	O
text	O
files	O
while	O
holding	O
more	O
sophisticated	O
editing	O
tools	O
,	O
as	O
observed	O
by	O
InfoWorld	O
,	O
and	O
making	O
use	O
of	O
extended	B-Device
memory	I-Device
.	O
</s>
<s>
Dr.	B-Application
Halo	I-Application
III	O
added	O
the	O
ability	O
to	O
correct	O
for	O
differences	O
in	O
the	O
aspect	O
ratio	O
between	O
the	O
screen	O
and	O
the	O
printer	O
as	O
well	O
as	O
improved	O
dither	O
algorithms	O
.	O
</s>
<s>
This	O
release	O
of	O
Dr.	B-Application
Halo	I-Application
also	O
added	O
more	O
features	O
to	O
the	O
palette	O
editor	O
.	O
</s>
<s>
Dr.	B-Application
Halo	I-Application
IV	O
spread	O
the	O
program	O
over	O
six	O
modules	O
:	O
the	O
graphics	O
editor	O
itself	O
,	O
a	O
file	O
viewer	O
,	O
a	O
presentation	O
program	O
,	O
a	O
terminate-and-stay-resident	O
screenshot	B-Application
utility	O
,	O
a	O
font	O
editor	O
and	O
an	O
image	O
file	O
conversion	O
utility	O
.	O
</s>
<s>
Media	O
Cybernetics	O
sold	O
the	O
lattermost	O
as	O
the	O
Halo	O
Desktop	O
Imager	O
;	O
it	O
could	O
convert	O
graphics	O
files	O
created	O
from	O
scanner	O
imaging	O
software	O
and	O
other	O
raster	B-Application
editors	I-Application
of	O
the	O
day	O
into	O
common	O
file	O
formats	O
such	O
as	O
TIFF	O
,	O
GIF	O
,	O
Windows	B-Device
BMP	I-Device
and	O
Dr.	B-Application
Halo	I-Application
's	O
own	O
HALO	O
CUT	O
format	O
.	O
</s>
<s>
They	O
also	O
introduced	O
the	O
Halo	O
Image	O
File	O
Format	O
Library	O
—	O
a	O
software	B-Library
library	I-Library
enabling	O
applications	O
to	O
read	O
and	O
write	O
bitmap	O
files	O
in	O
file	O
formats	O
such	O
as	O
the	O
aforementioned	O
—	O
and	O
Halo	O
FX	O
,	O
a	O
rebranded	O
version	O
of	O
Media	O
Cybernetics	O
 '	O
Publisher	O
's	O
Partner	O
,	O
a	O
true	O
desktop	O
publishing	O
program	O
.	O
</s>
<s>
Media	O
Cybernetics	O
discontinued	O
Dr.	B-Application
Halo	I-Application
after	O
version	O
4.0	O
but	O
used	O
its	O
source	O
code	O
to	O
develop	O
the	O
Halo	O
Imaging	O
Library	O
,	O
a	O
Windows	B-Application
software	B-Library
library	I-Library
comprising	O
100	O
imaging	O
functions	O
for	O
C	B-Language
development	O
.	O
</s>
<s>
Curt	O
Suplee	O
of	O
The	O
Washington	O
Post	O
praised	O
version	O
3.0	O
,	O
writing	O
"	O
Even	O
if	O
you	O
've	O
never	O
drawn	O
so	O
much	O
as	O
a	O
glass	O
of	O
water	O
,	O
[	O
Dr.	B-Application
Halo	I-Application
III ]	O
can	O
put	O
you	O
in	O
the	O
picture	O
.	O
</s>
<s>
Galen	O
Gruman	O
and	O
Andre	O
Kvitka	O
of	O
the	O
same	O
publication	O
were	O
more	O
tempered	O
with	O
their	O
praise	O
,	O
writing	O
that	O
Dr.	B-Application
Halo	I-Application
III	O
had	O
"	O
powerful	O
"	O
graphics	O
creation	O
and	O
editing	O
abilities	O
but	O
was	O
"	O
difficult	O
to	O
learn	O
because	O
of	O
its	O
unintuitive	O
interface	O
.	O
</s>
