<s>
Subnotebook	B-Device
,	O
also	O
called	O
ultraportable	B-Device
,	O
superportable	O
,	O
or	O
mini	B-Device
notebook	I-Device
,	O
was	O
a	O
marketing	O
term	O
for	O
laptop	B-Device
computers	I-Device
that	O
are	O
smaller	O
and	O
lighter	O
than	O
a	O
typical	O
notebook-sized	O
laptop	B-Device
.	O
</s>
<s>
As	O
typical	O
laptop	B-Device
sizes	O
have	O
decreased	O
over	O
the	O
course	O
of	O
the	O
2010s	O
,	O
and	O
other	O
distinguishing	O
features	O
have	O
become	O
mainstream	O
,	O
the	O
distinction	O
between	O
regular-size	O
and	O
'	O
subnotebook	B-Device
 '	O
laptops	B-Device
has	O
largely	O
disappeared	O
.	O
</s>
<s>
To	O
the	O
extent	O
that	O
it	O
still	O
exists	O
,	O
'	O
subnotebook	B-Device
 '	O
could	O
be	O
defined	O
as	O
machines	O
with	O
screen	O
smaller	O
than	O
13	O
"	O
but	O
with	O
a	O
permanently-attached	O
keyboard	O
intended	O
for	O
two-handed	O
typing	O
.	O
</s>
<s>
Prior	O
to	O
this	O
convergence	O
,	O
subnotebooks	B-Device
were	O
also	O
distinguished	O
from	O
netbooks	B-Device
and	O
ultra-mobile	B-Device
PCs	I-Device
,	O
based	O
on	O
both	O
size	O
and	O
market	O
position	O
.	O
</s>
<s>
Classic	O
subnotebooks	B-Device
were	O
smaller	O
than	O
full	O
sized	O
laptops	B-Device
but	O
larger	O
than	O
handheld	B-Operating_System
computers	I-Operating_System
.	O
</s>
<s>
They	O
were	O
distinguished	O
by	O
smaller	O
screens	O
and	O
bodies	O
and	O
lighter	O
weights	O
relative	O
to	O
contemporaneous	O
laptops	B-Device
.	O
</s>
<s>
The	O
savings	O
in	O
size	O
and	O
weight	O
were	O
often	O
achieved	O
partly	O
by	O
omitting	O
ports	B-Protocol
,	O
and	O
these	O
were	O
typically	O
the	O
first	O
machines	O
to	O
omit	O
optical	O
disc	O
drives	O
or	O
on	O
some	O
of	O
the	O
earliest	O
models	O
,	O
floppy	B-Device
disk	I-Device
drives	I-Device
.	O
</s>
<s>
They	O
were	O
also	O
some	O
of	O
the	O
first	O
systems	O
which	O
could	O
be	O
paired	O
with	O
docking	B-Device
stations	I-Device
to	O
compensate	O
.	O
</s>
<s>
One	O
notable	O
form-factor	O
of	O
subnotebook-oriented	O
docks	O
were	O
"	O
slice	O
docks	O
"	O
—	O
a	O
more	O
transportable	O
version	O
of	O
classic	O
docking	B-Device
station	I-Device
.	O
</s>
<s>
2018-current	O
(	O
Asia	O
only	O
)	O
Palmtop/handheld5	O
-9	O
"	O
0.3-0.8	O
kgSize	O
,	O
and	O
miniaturized	O
keyboardVaries	O
,	O
typically	O
ultra-low	O
power1989-currentNetbook7-13	O
"	O
0.7-1.5	O
kgVery	O
low	O
costLow	O
power	O
x86	O
;	O
</s>
<s>
The	O
TRS-80	B-Operating_System
Model	I-Operating_System
100	I-Operating_System
from	O
1983	O
was	O
one	O
of	O
the	O
first	O
mass-market	O
portable	O
computers	O
,	O
and	O
was	O
smaller	O
than	O
the	O
clam-shell	O
machines	O
of	O
the	O
same	O
era	O
;	O
it	O
used	O
a	O
slate	O
form	O
factor	O
,	O
with	O
no	O
hinge	O
and	O
the	O
keyboard	O
and	O
screen	O
on	O
the	O
same	O
plane	O
.	O
</s>
<s>
Its	O
later	O
sibling	O
the	O
Tandy	O
200	O
was	O
a	O
clam-shell	O
design	O
and	O
smaller	O
than	O
contemporary	O
laptops	B-Device
.	O
</s>
<s>
Either	O
could	O
be	O
regarded	O
as	O
an	O
early	O
subnotebook	B-Device
.	O
</s>
<s>
The	O
Compaq	O
LTE	O
,	O
launched	O
in	O
1989	O
,	O
was	O
the	O
first	O
to	O
be	O
widely	O
known	O
as	O
a	O
"	O
notebook	B-Device
computer	I-Device
"	O
because	O
its	O
relatively	O
small	O
dimensions	O
—	O
48	O
×	O
220	O
×	O
280mm	O
(	O
1.9	O
×	O
8.5	O
×	O
11inches	O
)	O
—	O
matched	O
those	O
of	O
a	O
pair	O
of	O
stacked	O
US	O
Letter	O
(	O
similar	O
to	O
A4	O
)	O
size	O
paper	O
notebooks	B-Device
.	O
</s>
<s>
In	O
1990	O
the	O
Compaq	O
release	O
was	O
followed	O
by	O
IBM	B-Device
PS/2	I-Device
note	I-Device
and	O
PS/55note	B-Device
lines	O
(	O
later	O
,	O
in	O
October	O
1992	O
they	O
was	O
replaced	O
by	O
the	O
first	O
IBM	B-Operating_System
ThinkPad	I-Operating_System
)	O
,	O
and	O
by	O
the	O
relatively	O
compact	O
Sharp	O
PC-6220	O
model	O
.	O
</s>
<s>
Starting	O
around	O
this	O
time	O
,	O
portables	O
with	O
noticeably	O
smaller	O
form	O
factors	O
sometimes	O
referred	O
as	O
subnotebooks	B-Device
.	O
</s>
<s>
The	O
term	O
may	O
have	O
been	O
first	O
applied	O
to	O
the	O
NEC	B-Device
UltraLite	I-Device
,	O
unveiled	O
in	O
1988	O
—	O
although	O
its	O
dimensions	O
(	O
1.4	O
"	O
×	O
8.3	O
"	O
×	O
11.75	O
"	O
)	O
were	O
very	O
similar	O
to	O
the	O
Compaq	O
LTE	O
,	O
but	O
slightly	O
lighter	O
(	O
)	O
.	O
</s>
<s>
There	O
were	O
also	O
a	O
few	O
notable	O
smaller-than	O
subnotebook	B-Device
PCs	O
at	O
this	O
time	O
,	O
including	O
the	O
Atari	B-Device
Portfolio	I-Device
and	O
HP	B-Device
95LX	I-Device
—	O
both	O
very	O
small	O
MS-DOS	B-Application
machines	O
,	O
roughly	O
comparable	O
in	O
size	O
to	O
later	O
handheld	B-Operating_System
PCs	I-Operating_System
.	O
</s>
<s>
At	O
the	O
end	O
of	O
1992	O
,	O
PCMag	O
magazine	O
described	O
two	O
models	O
as	O
subnotebooks	B-Device
:	O
these	O
were	O
the	O
Gateway	B-Device
Handbook	I-Device
the	O
Dell	B-Device
320SLi	I-Device
(	O
both	O
less	O
than	O
a	O
1.6kg	O
weight	O
)	O
,	O
and	O
another	O
was	O
released	O
in	O
Italy	O
:	O
the	O
Olivetti	B-Device
Quaderno	I-Device
.	O
</s>
<s>
Apple	O
and	O
Compaq	O
did	O
label	O
their	O
machines	O
as	O
"	O
subnotebooks	B-Device
"	O
in	O
this	O
period	O
,	O
but	O
the	O
PowerBook	B-Device
Duo	I-Device
and	O
Compaq	B-Device
LTE	I-Device
Lite	I-Device
otherwise	O
qualify	O
,	O
and	O
both	O
lines	O
were	O
among	O
the	O
first	O
to	O
broadly	O
popularize	O
docking	B-Device
stations	I-Device
.	O
</s>
<s>
Another	O
early	O
model	O
was	O
the	O
Hewlett-Packard	O
OmniBook	B-Device
300	I-Device
,	O
which	O
was	O
launched	O
as	O
a	O
"	O
superportable	O
"	O
in	O
1993	O
;	O
it	O
was	O
one	O
of	O
the	O
first	O
examples	O
to	O
use	O
a	O
flash	O
memory	O
disk	O
instead	O
of	O
a	O
hard	O
drive	O
,	O
to	O
reduce	O
the	O
weight	O
.	O
</s>
<s>
Toshiba	O
,	O
also	O
entered	O
the	O
market	O
that	O
year	O
with	O
the	O
Portege	B-Device
T3400	O
and	O
T3400CT	O
,	O
claiming	O
that	O
"	O
It	O
's	O
the	O
first	O
subnotebook	B-Device
computer	O
with	O
all	O
the	O
functionality	O
of	O
a	O
much	O
larger	O
computer	O
"	O
;	O
the	O
T3400CT	O
was	O
the	O
first	O
subnotebook	B-Device
with	O
a	O
color	O
screen	O
.	O
</s>
<s>
in	O
1995	O
,	O
Tosbiba	O
introduced	O
the	O
Libretto	B-Device
20	I-Device
,	O
with	O
a	O
6.1	O
″	O
screen	O
;	O
CNet	O
reported	O
about	O
the	O
Libretto	B-Device
50CT	O
that	O
"[it]	O
is	O
the	O
first	O
full-fledged	O
Windows	O
95	O
notebook	B-Device
in	O
the	O
United	O
States	O
weighing	O
less	O
than	O
two	O
pounds	O
"	O
.	O
</s>
<s>
Compaq	O
introduced	O
its	O
own	O
short	O
lived	O
subnotebook	B-Device
line	O
in	O
1994	O
called	O
Contura	B-Operating_System
Aero	I-Operating_System
,	O
notable	O
for	O
using	O
a	O
battery	O
which	O
was	O
intended	O
to	O
be	O
standard	O
rather	O
than	O
only	O
useful	O
for	O
Compaq	O
products	O
.	O
</s>
<s>
IBM	O
released	O
a	O
Palm	O
Top	O
PC	O
(	O
handheld	B-Application
laptop	B-Device
with	O
4.7	O
"	O
screen	O
)	O
in	O
1995	O
.	O
</s>
<s>
IBM	O
had	O
sold	O
"	O
thin	O
and	O
light	O
"	O
models	O
in	O
its	O
ThinkPad	B-Operating_System
range	O
,	O
such	O
as	O
the	O
ThinkPad	B-Operating_System
560	O
ultraportable	B-Device
(	O
1996	O
)	O
and	O
best-selling	O
ThinkPad	B-Device
600	I-Device
(	O
1998	O
)	O
.	O
</s>
<s>
It	O
finally	O
entered	O
the	O
subnotebook	B-Device
market	O
in	O
1999	O
with	O
the	O
1.3kg	O
ThinkPad	B-Device
240	I-Device
,	O
targeted	O
at	O
business	O
travellers	O
.	O
</s>
<s>
In	O
1997	O
Mitsubishi	O
Electric	O
released	O
ultra-compact	O
12.1	O
"	O
Mitsubishi	O
Pedion	O
laptop	B-Device
line	O
with	O
ultrathin	O
magnesium	O
case	O
(	O
18	O
×	O
218	O
×	O
297mm	O
)	O
and	O
chiclet	O
keyboard	O
.	O
</s>
<s>
Sony	O
launched	O
an	O
ultraportable	B-Device
(	O
ultrathin	O
)	O
less	O
than	O
an	O
inch	O
thick	O
in	O
Japan	O
-	O
the	O
PCG-505	O
,	O
which	O
reached	O
the	O
US	O
in	O
1997	O
as	O
the	O
VAIO	O
505GX	O
.	O
</s>
<s>
Apple	O
replace	O
the	O
aging	O
PowerBook	B-Device
Duo	I-Device
line	O
with	O
relatively	O
light-weight	O
(	O
)	O
but	O
short-lived	O
PowerBook	B-Device
2400c	I-Device
;	O
this	O
was	O
co-designed	O
by	O
IBM	O
,	O
and	O
manufactured	O
for	O
Apple	O
by	O
IBM	O
Japan	O
.	O
</s>
<s>
In	O
2000	O
Compaq	O
released	O
a	O
more	O
compact	O
successor	O
of	O
Digital	B-Device
HiNote	I-Device
line	O
-	O
the	O
10.3	O
"	O
Armada	O
M300	O
,	O
with	O
magnesium	O
case	O
and	O
1.6kg	O
weight	O
.	O
</s>
<s>
Sony	O
also	O
launched	O
the	O
C1	O
range	O
of	O
subnotebooks	B-Device
,	O
starting	O
in	O
Japan	O
in	O
1998	O
.	O
</s>
<s>
This	O
period	O
was	O
notable	O
for	O
a	O
major	O
split	O
between	O
lower-power-consumption	O
and	O
higher	O
power	O
x86	O
processors	O
in	O
laptops	B-Device
;	O
although	O
Intel	O
released	O
the	O
Pentium	B-General_Concept
4	I-General_Concept
mobile	O
chips	O
,	O
the	O
mobile	B-General_Concept
Pentium	I-General_Concept
III	I-General_Concept
remained	O
available	O
because	O
of	O
high	O
power	O
consumption	O
on	O
the	O
Pentium	B-General_Concept
4	I-General_Concept
leading	O
to	O
high	O
heat	O
and	O
short	O
battery	O
life	O
.	O
</s>
<s>
This	O
was	O
followed	O
by	O
the	O
Pentium	B-Architecture
M	I-Architecture
,	O
which	O
was	O
a	O
dedicated	O
line	O
of	O
mobile	O
processors	O
with	O
no	O
desktop	O
equivalent	O
.	O
</s>
<s>
In	O
2006	O
,	O
Microsoft	O
introduced	O
a	O
new	O
ultra-mobile	B-Device
PC	I-Device
format	O
,	O
under	O
the	O
code-name	O
Origami	O
.	O
</s>
<s>
These	O
were	O
smaller	O
versions	O
of	O
Tablet	B-Device
PC	I-Device
computers	O
;	O
One	O
example	O
was	O
the	O
Samsung	B-Device
Q1	I-Device
.	O
</s>
<s>
Since	O
2007	O
,	O
the	O
laptop	B-Device
computer	I-Device
market	O
has	O
seen	O
an	O
increased	O
segmentation	O
of	O
microprocessor	O
lines	O
to	O
different	O
purposes	O
and	O
power	O
levels	O
,	O
including	O
the	O
introduction	O
of	O
the	O
Intel	B-Device
Atom	I-Device
,	O
ultra-low-voltage	B-General_Concept
processors	I-General_Concept
which	O
has	O
since	O
having	O
become	O
mainstream	O
,	O
and	O
the	O
use	O
of	O
ARM	B-Architecture
microprocessors	I-Architecture
.	O
</s>
<s>
On	O
the	O
other	O
hand	O
,	O
over	O
the	O
course	O
of	O
the	O
2010s	O
,	O
with	O
growing	O
of	O
sales	O
for	O
mainstream	O
users	O
,	O
optical	O
drives	O
and	O
legacy	O
ports	B-Protocol
became	O
uncommon	O
,	O
and	O
some	O
classic	O
subnotebook	B-Device
features	O
(	O
like	O
additional	O
replaceable	O
batteries	O
,	O
alternative	O
input	O
methods	O
,	O
docking	O
options	O
,	O
Smart	O
Cards	O
,	O
mobile	O
broadband	O
modules	O
,	O
additional	O
storage	O
)	O
become	O
rare	O
.	O
</s>
<s>
At	O
Computex	O
2011	O
Intel	O
announced	O
a	O
new	O
system	O
branding	O
called	O
Ultrabooks	B-Device
;	O
these	O
very	O
much	O
match	O
the	O
prior	O
description	O
of	O
subnotebooks	B-Device
-	O
they	O
used	O
lower-powered	O
processors	O
(	O
but	O
not	O
as	O
low-end	O
as	O
netbooks	B-Device
)	O
and	O
with	O
each	O
generation	O
of	O
Intel	O
processors	O
,	O
the	O
lower-powered	O
U-series	O
processors	O
became	O
a	O
larger	O
part	O
of	O
mainstream	O
sales	O
.	O
</s>
<s>
typically	O
lacked	O
optical	O
drives	O
and	O
legacy	O
ports	B-Protocol
,	O
and	O
were	O
generally	O
compact	O
,	O
but	O
as	O
marketed	O
the	O
two	O
terms	O
were	O
rarely	O
used	O
together	O
.	O
</s>
<s>
In	O
2007	O
the	O
ASUS	B-Device
Eee	I-Device
PC	I-Device
became	O
the	O
first	O
of	O
a	O
new	O
class	O
of	O
low-cost	O
laptops	B-Device
commonly	O
called	O
netbooks	B-Device
.	O
</s>
<s>
Netbooks	B-Device
are	O
typically	O
based	O
upon	O
the	O
Atom	B-Device
processors	I-Device
,	O
while	O
other	O
subnotebooks	B-Device
use	O
more	O
powerful	O
processors	O
such	O
as	O
ULV	B-General_Concept
types	O
.	O
</s>
<s>
In	O
2008	O
,	O
Apple	O
introduced	O
the	O
MacBook	B-Device
Air	I-Device
,	O
which	O
the	O
company	O
claimed	O
was	O
the	O
world	O
's	O
thinnest	O
notebook	B-Device
.	O
</s>
<s>
In	O
the	O
same	O
year	O
Lenovo	O
released	O
last	O
widely	O
known	O
hi-end	O
12	O
"	O
subnotebook	B-Device
line	O
without	O
touchpad	O
,	O
the	O
ThinkPad	B-Operating_System
X200	O
,	O
X200s	O
and	O
X200	O
Tablet	B-Device
models	O
.	O
</s>
<s>
In	O
2010	O
saw	O
a	O
number	O
of	O
semi-rugged	O
low-end	O
subnotebooks	B-Device
for	O
the	O
education	O
market	O
,	O
including	O
the	O
Dell	O
Latitude	O
2100	O
,	O
Lenovo	B-Operating_System
ThinkPad	I-Operating_System
x100e	O
,	O
and	O
HP	O
ProBook	O
Education	O
Edition	O
;	O
these	O
notably	O
had	O
laptop	B-Device
charging	I-Device
trolley	I-Device
support	O
.	O
</s>
<s>
In	O
2011	O
,	O
the	O
first	O
Chromebooks	B-Operating_System
were	O
introduced	O
by	O
Google	O
,	O
and	O
Intel	O
's	O
introduced	O
the	O
Ultrabook	B-Device
branding	O
for	O
premium	O
thin-and-light	O
laptops	B-Device
.	O
</s>
<s>
Over	O
the	O
next	O
several	O
years	O
,	O
specific	O
marketing	O
of	O
laptops	B-Device
as	O
"	O
subnotebooks	B-Device
"	O
died	O
out	O
,	O
and	O
since	O
2017	O
the	O
term	O
is	O
essentially	O
dead	O
in	O
mainstream	O
branding	O
.	O
</s>
<s>
As	O
of	O
2021	O
plenty	O
of	O
smaller	O
laptops	B-Device
remain	O
on	O
the	O
market	O
which	O
could	O
adequately	O
be	O
described	O
as	O
subnotebooks	B-Device
,	O
and	O
the	O
term	O
is	O
still	O
sometimes	O
used	O
informally	O
although	O
is	O
no	O
longer	O
used	O
by	O
manufacturers	O
.	O
</s>
