<s>
An	O
all-in-one	B-Device
computer	I-Device
or	O
all-in-one	B-Device
PC	I-Device
(	O
AIO	O
)	O
is	O
a	O
personal	B-Device
computer	I-Device
that	O
integrates	O
the	O
system	O
's	O
internal	O
components	O
into	O
the	O
same	O
case	O
as	O
the	O
display	O
,	O
thus	O
occupying	O
a	O
smaller	O
footprint	O
(	O
with	O
fewer	O
cables	O
)	O
than	O
desktops	B-Device
that	O
incorporate	O
a	O
tower	B-General_Concept
.	O
</s>
<s>
Some	O
advantages	O
of	O
the	O
all-in-one	B-Device
computer	I-Device
compared	O
to	O
other	O
form	O
factors	O
include	O
being	O
easier	O
to	O
set	O
up	O
,	O
a	O
reduced	O
physical	O
footprint	O
,	O
ease	O
of	O
transportation	O
,	O
and	O
the	O
option	O
to	O
interface	O
with	O
the	O
computer	O
via	O
touchscreen	B-Device
(	O
a	O
now-common	O
fixture	O
on	O
all-in-ones	O
)	O
.	O
</s>
<s>
Some	O
disadvantages	O
include	O
generally	O
being	O
more	O
expensive	O
than	O
desktop	B-Device
computers	I-Device
,	O
a	O
lack	O
of	O
customizability	O
—	O
most	O
of	O
the	O
internal	O
hardware	O
such	O
as	O
the	O
RAM	B-Architecture
and	O
the	O
SSD	B-Device
,	O
especially	O
in	O
post-late-2010s	O
machines	O
,	O
is	O
soldered	O
onto	O
the	O
system	O
board	O
—	O
a	O
lack	O
of	O
upgrade	O
paths	O
for	O
the	O
CPU	B-General_Concept
,	O
RAM	B-Architecture
,	O
and	O
technology	B-Device
of	I-Device
the	I-Device
display	I-Device
,	O
and	O
the	O
difficulty	O
of	O
repair	O
.	O
</s>
<s>
This	O
form	O
factor	O
was	O
popular	O
during	O
the	O
early	O
1980s	O
for	O
personal	B-Device
computers	I-Device
intended	O
for	O
professional	O
use	O
such	O
as	O
the	O
Commodore	B-Device
PET	I-Device
,	O
the	O
Osborne	B-Device
1	I-Device
,	O
the	O
TRS-80	B-Device
Model	I-Device
II	I-Device
,	O
and	O
the	O
Datapoint	B-Device
2200	I-Device
.	O
</s>
<s>
Many	O
manufacturers	O
of	O
home	O
computers	O
like	O
Commodore	O
and	O
Atari	O
included	O
the	O
computer	O
's	O
motherboard	B-Device
into	I-Device
the	I-Device
same	I-Device
enclosure	I-Device
as	I-Device
the	I-Device
keyboard	I-Device
;	O
these	O
systems	O
were	O
most	O
often	O
connected	O
to	O
a	O
television	O
set	O
for	O
display	O
.	O
</s>
<s>
Apple	O
has	O
manufactured	O
several	O
popular	O
examples	O
of	O
all-in-one	O
computers	O
,	O
such	O
as	O
the	O
original	B-Device
Macintosh	I-Device
of	O
the	O
mid-1980s	O
and	O
the	O
iMac	B-Device
G3	I-Device
of	O
the	O
late	O
1990s	O
and	O
2000s	O
.	O
</s>
<s>
By	O
the	O
mid	O
2000s	O
,	O
many	O
all-in-one	O
designs	O
have	O
used	O
flat-panel	B-General_Concept
displays	I-General_Concept
(	O
chiefly	O
LCDs	B-Device
)	O
,	O
and	O
later	O
models	O
have	O
incorporated	O
touchscreen	B-Device
displays	O
,	O
allowing	O
them	O
to	O
be	O
used	O
similarly	O
to	O
a	O
mobile	O
tablet	B-Device
.	O
</s>
<s>
Since	O
the	O
early	O
2000s	O
,	O
some	O
all-in-one	O
desktops	B-Device
,	O
such	O
as	O
the	O
iMac	B-Device
G4	I-Device
,	O
have	O
used	O
laptop	B-Device
components	O
in	O
order	O
to	O
reduce	O
the	O
size	O
of	O
the	O
system	O
case	O
.	O
</s>
<s>
Like	O
most	O
laptops	B-Device
,	O
some	O
all-in-one	O
desktop	B-Device
computers	I-Device
are	O
characterized	O
by	O
an	O
inability	O
to	O
customize	O
or	O
upgrade	O
internal	O
components	O
,	O
as	O
the	O
systems	O
 '	O
cases	O
do	O
not	O
provide	O
convenient	O
access	O
to	O
upgradable	O
components	O
,	O
and	O
faults	O
in	O
certain	O
aspects	O
of	O
the	O
hardware	O
may	O
require	O
the	O
entire	O
computer	O
to	O
be	O
replaced	O
,	O
regardless	O
of	O
the	O
health	O
of	O
its	O
remaining	O
components	O
.	O
</s>
<s>
There	O
have	O
been	O
exceptions	O
to	O
this	O
;	O
the	O
monitor	O
portion	O
of	O
HP	B-Device
's	I-Device
Z1	I-Device
workstation	O
can	O
be	O
angled	O
flat	O
,	O
and	O
opened	O
like	O
a	O
vehicle	O
hood	O
for	O
access	O
to	O
internal	O
hardware	O
.	O
</s>
