<s>
Incremental	B-Application
rendering	I-Application
refers	O
to	O
a	O
feature	O
built	O
into	O
most	O
modern	O
Web	B-Application
browsers	I-Application
.	O
</s>
<s>
Specifically	O
,	O
this	O
refers	O
to	O
the	O
browser	B-Application
's	O
ability	O
to	O
display	O
a	O
partially	O
downloaded	O
Web	O
page	O
to	O
the	O
user	O
while	O
the	O
browser	B-Application
awaits	O
the	O
remaining	O
files	O
from	O
the	O
server	O
.	O
</s>
<s>
The	O
advantage	O
to	O
the	O
user	O
is	O
a	O
perceived	O
improvement	O
in	O
responsiveness	O
,	O
both	O
from	O
the	O
Web	B-Application
browser	I-Application
and	O
from	O
the	O
web	O
site	O
.	O
</s>
<s>
The	O
purpose	O
of	O
incremental	B-Application
rendering	I-Application
is	O
similar	O
to	O
the	O
purpose	O
of	O
the	O
interlaced	O
JPEG	O
,	O
which	O
improves	O
the	O
presentation	O
speed	O
to	O
the	O
user	O
by	O
quickly	O
displaying	O
a	O
low-resolution	O
version	O
of	O
an	O
image	O
which	O
improves	O
to	O
a	O
high-resolution	O
,	O
rather	O
than	O
an	O
image	O
that	O
slowly	O
paints	O
from	O
top	O
to	O
bottom	O
.	O
</s>
<s>
Without	O
incremental	B-Application
rendering	I-Application
,	O
a	O
web	B-Application
browser	I-Application
must	O
wait	O
until	O
the	O
code	O
for	O
a	O
page	O
is	O
fully	O
loaded	O
before	O
it	O
can	O
present	O
content	O
to	O
the	O
user	O
.	O
</s>
<s>
Earlier	O
web	B-Application
browsers	I-Application
offered	O
something	O
of	O
a	O
compromise	O
-	O
displaying	O
the	O
HTML	B-Language
page	O
once	O
the	O
entire	O
HTML	B-Language
file	I-Language
had	O
been	O
retrieved	O
,	O
and	O
then	O
inserting	O
the	O
images	O
one-by-one	O
as	O
they	O
were	O
retrieved	O
afterwards	O
.	O
</s>
<s>
Although	O
the	O
utility	O
of	O
incremental	B-Application
rendering	I-Application
seems	O
intuitively	O
obvious	O
,	O
making	O
it	O
happen	O
is	O
something	O
of	O
an	O
art	O
as	O
well	O
as	O
a	O
science	O
.	O
</s>
<s>
Images	O
in	O
particular	O
are	O
virtually	O
always	O
loaded	O
following	O
the	O
HTML	B-Language
page	O
,	O
as	O
the	O
browser	B-Application
must	O
consult	O
the	O
HTML	B-Language
file	I-Language
in	O
order	O
to	O
know	O
which	O
images	O
to	O
request	O
from	O
the	O
server	O
-	O
as	O
the	O
server	O
does	O
n't	O
present	O
them	O
automatically	O
without	O
the	O
follow-up	O
request	O
.	O
</s>
<s>
Web	O
designers	O
and	O
web	O
design	O
software	O
often	O
include	O
hints	O
that	O
assist	O
with	O
this	O
process	O
-	O
for	O
example	O
,	O
including	O
the	O
expected	O
heights	O
and	O
widths	O
of	O
images	O
in	O
the	O
HTML	B-Language
code	I-Language
so	O
the	O
browser	B-Application
may	O
allocate	O
the	O
correct	O
amount	O
of	O
screen	O
space	O
before	O
the	O
image	O
is	O
actually	O
retrieved	O
from	O
the	O
server	O
.	O
</s>
