<s>
The	O
Surface	B-Device
Book	I-Device
is	O
a	O
2-in-1	B-Device
PC	I-Device
designed	O
and	O
produced	O
by	O
Microsoft	O
,	O
part	O
of	O
the	O
company	O
's	O
Surface	B-Device
line	O
of	O
personal	B-Device
computing	I-Device
devices	O
.	O
</s>
<s>
Surface	B-Device
Book	I-Device
is	O
distinguished	O
from	O
other	O
Surface	B-Device
devices	O
primarily	O
by	O
its	O
full-sized	O
,	O
detachable	O
keyboard	B-Device
,	O
which	O
uses	O
a	O
dynamic	O
fulcrum	O
hinge	B-Operating_System
that	O
expands	O
when	O
it	O
is	O
opened	O
.	O
</s>
<s>
The	O
keyboard	B-Device
contains	O
a	O
second	O
battery	O
,	O
a	O
number	O
of	O
ports	B-Protocol
and	O
an	O
optional	O
discrete	B-Architecture
graphics	I-Architecture
card	I-Architecture
used	O
when	O
the	O
screen	O
part	O
,	O
also	O
dubbed	O
as	O
the	O
clipboard	O
by	O
Microsoft	O
,	O
is	O
docked	O
to	O
it	O
.	O
</s>
<s>
Unlike	O
Surface	B-Device
Pro	I-Device
devices	O
,	O
which	O
are	O
marketed	O
as	O
tablets	B-Device
,	O
the	O
Surface	B-Device
Book	I-Device
is	O
marketed	O
as	O
a	O
laptop	B-Device
,	O
Microsoft	O
's	O
first	O
device	O
marketed	O
as	O
such	O
.	O
</s>
<s>
Unlike	O
the	O
Surface	B-Device
Laptop	I-Device
devices	O
,	O
the	O
two	O
parts	O
are	O
detachable	O
.	O
</s>
<s>
Surface	B-Device
Book	I-Device
was	O
announced	O
at	O
the	O
Windows	B-Operating_System
10	I-Operating_System
Devices	O
Event	O
by	O
Microsoft	O
on	O
October	O
6	O
,	O
2015	O
,	O
alongside	O
the	O
Surface	B-Device
Pro	I-Device
4	I-Device
,	O
and	O
went	O
on	O
sale	O
shortly	O
thereafter	O
.	O
</s>
<s>
At	O
the	O
announcement	O
,	O
Panos	O
Panay	O
,	O
corporate	O
vice	O
president	O
for	O
Surface	B-Device
Computing	O
at	O
Microsoft	O
,	O
initially	O
presented	O
the	O
device	O
as	O
a	O
laptop	B-Device
and	O
positioned	O
it	O
as	O
a	O
competitor	O
to	O
the	O
MacBook	B-Device
Pro	I-Device
,	O
before	O
revealing	O
that	O
it	O
was	O
a	O
hybrid	O
device	O
,	O
with	O
a	O
screen	O
that	O
could	O
be	O
detached	O
and	O
used	O
with	O
just	O
the	O
Surface	B-Device
Pen	I-Device
.	O
</s>
<s>
In	O
October	O
2016	O
,	O
Microsoft	O
announced	O
an	O
updated	O
Surface	B-Device
Book	I-Device
with	O
a	O
new	O
Nvidia	O
GeForce	O
GTX	O
965M	O
GPU	B-Architecture
and	O
additional	O
battery	O
life	O
over	O
the	O
original	O
model	O
.	O
</s>
<s>
In	O
May	O
2017	O
,	O
Microsoft	O
revealed	O
the	O
successor	O
to	O
the	O
Surface	B-Device
Book	I-Device
,	O
the	O
Surface	B-Device
Book	I-Device
2	I-Device
,	O
which	O
was	O
itself	O
replaced	O
by	O
the	O
Surface	B-Device
Book	I-Device
3	I-Device
in	O
2020	O
.	O
</s>
<s>
The	O
Surface	B-Device
Book	I-Device
's	O
design	O
was	O
influenced	O
by	O
a	O
goal	O
to	O
design	O
a	O
2-in-1	B-Device
convertible	I-Device
tablet	B-Device
that	O
could	O
be	O
folded	O
like	O
a	O
laptop	B-Device
,	O
and	O
not	O
require	O
the	O
keyboard	B-Device
to	O
be	O
heavier	O
than	O
the	O
tablet	B-Device
portion	O
in	O
order	O
to	O
support	O
and	O
balance	O
the	O
tablet	B-Device
portion	O
.	O
</s>
<s>
To	O
reach	O
this	O
goal	O
,	O
the	O
Surface	B-Device
development	O
team	O
developed	O
a	O
special	O
hinge	B-Operating_System
on	O
the	O
keyboard	B-Device
that	O
would	O
increase	O
the	O
footprint	O
of	O
the	O
device	O
when	O
opened	O
,	O
thus	O
maintaining	O
the	O
balance	O
without	O
increasing	O
the	O
weight	O
differential	O
between	O
the	O
two	O
parts	O
.	O
</s>
<s>
The	O
hinge	B-Operating_System
is	O
accompanied	O
by	O
muscle	O
wire	O
locks	O
that	O
secure	O
the	O
tablet	B-Device
portion	O
to	O
the	O
keyboard	B-Device
.	O
</s>
<s>
The	O
wires	O
are	O
made	O
from	O
nickel	O
titanium	O
—	O
an	O
alloy	O
that	O
contracts	O
when	O
exposed	O
to	O
an	O
electrical	O
current	O
;	O
pressing	O
a	O
release	O
button	O
on	O
the	O
keyboard	B-Device
sends	O
an	O
electrical	O
impulse	O
through	O
the	O
wires	O
that	O
attach	O
or	O
release	O
the	O
clips	O
.	O
</s>
<s>
The	O
team	O
also	O
worked	O
with	O
the	O
Microsoft	O
team	O
developing	O
Windows	B-Operating_System
10	I-Operating_System
to	O
implement	O
a	O
switchable	O
graphics	O
system	O
,	O
where	O
the	O
tablet	B-Device
would	O
be	O
able	O
to	O
switch	O
to	O
a	O
discrete	B-Architecture
graphics	I-Architecture
card	I-Architecture
located	O
within	O
the	O
keyboard	B-Device
when	O
docked	O
,	O
and	O
revert	O
to	O
internal	O
graphics	O
when	O
undocked	O
.	O
</s>
<s>
The	O
Surface	B-Device
Book	I-Device
's	O
use	O
cases	O
are	O
reflected	O
by	O
several	O
design	O
decisions	O
,	O
such	O
as	O
referring	O
to	O
the	O
tablet	B-Device
portion	O
as	O
being	O
a	O
clipboard	O
.	O
</s>
<s>
Additionally	O
,	O
while	O
the	O
device	O
as	O
a	O
whole	O
is	O
rated	O
as	O
having	O
12	O
hours	O
of	O
battery	O
life	O
,	O
this	O
capacity	O
is	O
divided	O
between	O
two	O
separate	O
batteries	O
within	O
the	O
clipboard	O
and	O
keyboard	B-Device
portions	O
:	O
the	O
clipboard	O
has	O
a	O
4-hour	O
battery	O
,	O
while	O
the	O
base	O
has	O
8-hour	O
.	O
</s>
<s>
The	O
Surface	B-Device
Book	I-Device
's	O
keyboard	B-Device
is	O
considered	O
a	O
standard	O
component	O
of	O
the	O
device	O
,	O
and	O
is	O
bundled	O
with	O
all	O
models	O
.	O
</s>
<s>
The	O
device	O
consists	O
of	O
a	O
tablet	B-Device
portion	O
with	O
a	O
,	O
3000×2000	O
resolution	O
display	O
,	O
and	O
a	O
keyboard	B-Device
attachment	O
.	O
</s>
<s>
That	O
allows	O
it	O
to	O
function	O
similarly	O
to	O
a	O
traditional	O
laptop	B-Device
.	O
</s>
<s>
The	O
Surface	B-Device
Book	I-Device
's	O
keyboard	B-Device
utilizes	O
a	O
dynamic	O
fulcrum	O
hinge	B-Operating_System
,	O
which	O
compresses	O
when	O
closed	O
,	O
and	O
expands	O
outwards	O
when	O
opened	O
.	O
</s>
<s>
The	O
hinge	B-Operating_System
design	O
allows	O
the	O
tablet	B-Device
portion	O
to	O
be	O
held	O
up	O
at	O
an	O
angle	O
resembling	O
a	O
traditional	O
laptop	B-Device
screen	O
without	O
the	O
use	O
of	O
a	O
kickstand	O
,	O
a	O
supporting	O
part	O
found	O
in	O
Surface-series	O
devices	O
,	O
and	O
increases	O
the	O
physical	O
room	O
between	O
the	O
keyboard	B-Device
and	O
the	O
tablet	B-Device
.	O
</s>
<s>
Surface	B-Device
Book	I-Device
is	O
the	O
first	O
Surface-family	O
2-in-1	B-Device
to	O
be	O
shipped	O
with	O
a	O
keyboard	B-Device
.	O
</s>
<s>
Contrary	O
to	O
a	O
Type	O
Cover	O
optional	O
keyboard	B-Device
accessory	O
of	O
other	O
Surface	B-Device
tablets	I-Device
,	O
Surface	B-Device
Book	I-Device
's	O
keyboard	B-Device
is	O
a	O
thick	O
and	O
sturdy	O
part	O
,	O
capable	O
of	O
folding	O
back	O
behind	O
the	O
display	O
.	O
</s>
<s>
It	O
contains	O
two	O
USB	O
3.0	O
ports	B-Protocol
,	O
full-size	O
SD	B-Device
card	I-Device
slot	O
on	O
the	O
left	O
,	O
Mini	B-Protocol
DisplayPort	I-Protocol
and	O
SurfaceConnect	O
port	O
on	O
the	O
right	O
,	O
has	O
an	O
integrated	O
additional	O
battery	O
and	O
an	O
optional	O
Nvidia	O
discrete	B-Device
GPU	I-Device
with	O
1GB	O
of	O
video	O
memory	O
.	O
</s>
<s>
It	O
can	O
be	O
used	O
for	O
non-demanding	O
tasks	O
such	O
as	O
web	O
browsing	O
without	O
the	O
connected	O
keyboard	B-Device
part	O
,	O
and	O
when	O
laptop	B-Device
convenience	O
,	O
extended	O
connectivity	O
,	O
performance	O
,	O
and	O
battery	O
life	O
are	O
needed	O
—	O
with	O
the	O
keyboard	B-Device
attached	O
.	O
</s>
<s>
The	O
2-in-1	B-Device
'	O
s	O
display	O
features	O
the	O
same	O
3:2	O
aspect	B-General_Concept
ratio	I-General_Concept
and	O
10-point	O
multi-touch	B-Application
display	O
,	O
found	O
in	O
other	O
Surface	B-Device
tablets	I-Device
starting	O
from	O
Surface	B-Device
Pro	I-Device
3	O
,	O
but	O
its	O
size	O
and	O
resolution	O
are	O
significantly	O
increased	O
at	O
and	O
3000×2000	O
(	O
267PPI	O
)	O
respectively	O
.	O
</s>
<s>
Surface	B-Device
Book	I-Device
models	O
are	O
built	O
with	O
a	O
6th	O
generation	O
Skylake	B-Architecture
Intel	O
Core	O
i5	O
or	O
i7	O
processors	B-General_Concept
.	O
</s>
<s>
The	O
top	O
CPU	O
option	O
,	O
i7-6600U	O
,	O
has	O
a	O
clock	O
rate	O
of	O
2.6GHz	O
,	O
with	O
up	O
to	O
3.4GHz	O
in	O
Turbo	B-Device
Boost	I-Device
mode	O
.	O
</s>
<s>
There	O
is	O
an	O
Intel	O
HD	O
Graphics	O
520	O
GPU	B-Architecture
available	O
,	O
integrated	O
in	O
all	O
processor	O
options	O
,	O
however	O
it	O
is	O
possible	O
to	O
order	O
a	O
Surface	B-Device
Book	I-Device
with	O
an	O
additional	O
custom	O
variant	O
of	O
Nvidia	O
GeForce	O
940M	O
Maxwell-architecture	O
discrete	B-Device
GPU	I-Device
for	O
the	O
improved	O
operation	O
of	O
GPU	B-Architecture
performance-demanding	O
programs	O
such	O
as	O
Adobe	B-Operating_System
Premiere	I-Operating_System
Pro	I-Operating_System
.	O
</s>
<s>
During	O
the	O
presentation	O
it	O
was	O
stated	O
that	O
the	O
models	O
with	O
Nvidia	O
GPU	B-Architecture
can	O
comfortably	O
run	O
games	O
with	O
a	O
performance	O
footprint	O
of	O
League	B-Application
of	I-Application
Legends	I-Application
.	O
</s>
<s>
The	O
Surface	B-Device
Book	I-Device
is	O
able	O
to	O
connect	O
and	O
disconnect	O
the	O
discrete	B-Device
GPU	I-Device
automatically	O
,	O
on-the-fly	O
and	O
without	O
an	O
OS	B-General_Concept
reboot	B-Device
needed	O
,	O
when	O
user	O
attaches	O
and	O
detaches	O
the	O
keyboard	B-Device
part	O
.	O
</s>
<s>
Two	O
system	B-Architecture
memory	I-Architecture
options	O
available	O
are	O
:	O
8	O
or	O
16GB	O
and	O
four	O
SSD	B-Device
options	O
:	O
128	O
,	O
256	O
,	O
512	O
GB	O
,	O
or	O
1	O
TB	O
,	O
but	O
the	O
higher	O
SSD	B-Device
option	O
is	O
not	O
available	O
in	O
some	O
countries	O
.	O
</s>
<s>
At	O
the	O
Microsoft	O
Windows	B-Operating_System
10	I-Operating_System
event	O
on	O
October	O
26	O
,	O
2016	O
,	O
Microsoft	O
announced	O
a	O
version	O
of	O
the	O
Surface	B-Device
Book	I-Device
that	O
contained	O
an	O
updated	O
Nvidia	O
GeForce	O
GTX	O
965M	O
discrete	B-Device
GPU	I-Device
along	O
with	O
an	O
additional	O
1	O
GB	O
of	O
GDDR5	O
video	O
memory	O
(	O
meaning	O
the	O
new	O
Surface	B-Device
Book	I-Device
now	O
has	O
2	O
GB	O
of	O
vRAM	O
instead	O
of	O
1	O
GB	O
)	O
.	O
</s>
<s>
The	O
base	O
of	O
this	O
updated	O
Surface	B-Device
Book	I-Device
is	O
also	O
thicker	O
than	O
the	O
original	O
in	O
order	O
to	O
incorporate	O
an	O
additional	O
cooling	O
fan	O
for	O
the	O
new	O
GPU	B-Architecture
and	O
more	O
internal	O
batteries	O
,	O
allowing	O
for	O
an	O
additional	O
4	O
hours	O
of	O
video	O
playback	O
-	O
upping	O
the	O
total	O
claimed	O
runtime	O
of	O
the	O
device	O
to	O
16	O
hours	O
.	O
</s>
<s>
This	O
model	O
is	O
also	O
heavier	O
and	O
is	O
available	O
only	O
with	O
an	O
Intel	B-Device
Core	I-Device
i7	I-Device
processor	O
.	O
</s>
<s>
There	O
are	O
no	O
upgrades	O
to	O
the	O
processors	B-General_Concept
,	O
RAM	B-Architecture
,	O
or	O
storage	O
in	O
the	O
Surface	B-Device
Book	I-Device
with	O
Performance	O
Base	O
over	O
the	O
original	O
.	O
</s>
<s>
Surface	B-Device
Book	I-Device
models	O
ship	O
with	O
a	O
pre-installed	O
64-bit	O
version	O
of	O
Windows	B-Operating_System
10	I-Operating_System
Pro	I-Operating_System
and	O
a	O
30-day	O
trial	B-License
Microsoft	B-Application
Office	I-Application
suite	I-Application
.	O
</s>
<s>
A	O
Surface	B-Device
Dock	O
was	O
announced	O
alongside	O
the	O
Surface	B-Device
Book	I-Device
and	O
Surface	B-Device
Pro	I-Device
4	I-Device
,	O
and	O
is	O
compatible	O
with	O
both	O
devices	O
.	O
</s>
<s>
It	O
is	O
also	O
backward	O
compatible	O
with	O
the	O
Surface	B-Device
Pro	I-Device
3	O
.	O
</s>
<s>
The	O
Surface	B-Device
Dock	O
adds	O
two	O
Mini	B-Protocol
DisplayPorts	I-Protocol
,	O
one	O
Gigabit	O
Ethernet	O
,	O
four	O
USB	O
3.0	O
and	O
one	O
audio	O
out	O
port	O
to	O
the	O
2-in-1	B-Device
.	O
</s>
<s>
Just	O
like	O
the	O
Surface	B-Device
Pro	I-Device
devices	O
,	O
Surface	B-Device
Book	I-Device
includes	O
a	O
Surface	B-Device
Pen	I-Device
.	O
</s>
<s>
Surface	B-Device
Book	I-Device
ships	O
with	O
the	O
latest	O
version	O
of	O
the	O
pen	O
with	O
1024	O
levels	O
of	O
pressure	O
.	O
</s>
<s>
A	O
Surface	B-Device
Pen	I-Device
Tip	O
Kit	O
is	O
also	O
available	O
for	O
order	O
,	O
which	O
includes	O
a	O
set	O
of	O
pen	O
tips	O
of	O
various	O
diameter	O
aimed	O
for	O
artists	O
and	O
illustrators	O
.	O
</s>
<s>
Upon	O
release	O
the	O
Surface	B-Device
Book	I-Device
received	O
critical	O
acclaim	O
for	O
its	O
design	O
and	O
functionality	O
,	O
as	O
well	O
as	O
its	O
integration	O
of	O
a	O
secondary	O
GPU	B-Architecture
into	O
the	O
keyboard	B-Device
.	O
</s>
<s>
However	O
,	O
the	O
lack	O
of	O
certain	O
features	O
,	O
such	O
as	O
LTE	O
connectivity	O
and	O
USB-C	O
ports	B-Protocol
,	O
was	O
noted	O
along	O
with	O
the	O
price	O
of	O
the	O
highest-specs	O
model	O
(	O
US$	O
3,200	O
for	O
one	O
with	O
1TB	O
of	O
storage	O
and	O
a	O
Core	B-Device
i7	I-Device
)	O
.	O
</s>
<s>
In	O
addition	O
,	O
many	O
reviewers	O
had	O
pre-release	O
issues	O
with	O
the	O
hinge	B-Operating_System
undocking	O
mechanism	O
and	O
graphics	O
display	O
drivers	O
,	O
both	O
of	O
which	O
Microsoft	O
resolved	O
at	O
a	O
later	O
date	O
through	O
a	O
Windows	O
software	O
update	O
.	O
</s>
<s>
The	O
first	O
review	O
versions	O
of	O
the	O
hardware	O
did	O
not	O
initially	O
have	O
Windows	O
Hello	O
enabled	O
,	O
but	O
after	O
a	O
firmware	B-Application
update	O
enabled	O
it	O
reception	O
of	O
the	O
feature	O
was	O
positive	O
.	O
</s>
<s>
The	O
"	O
teardown	O
"	O
site	O
iFixit	O
scored	O
the	O
Surface	B-Device
Book	I-Device
1/10	O
for	O
repairability	O
mainly	O
due	O
to	O
the	O
use	O
of	O
glue	O
instead	O
of	O
screws	O
to	O
hold	O
the	O
unit	O
together	O
and	O
the	O
impossibility	O
of	O
upgrading	O
things	O
such	O
as	O
the	O
CPU	O
and	O
RAM	B-Architecture
that	O
are	O
both	O
soldered	O
to	O
the	O
motherboard	O
.	O
</s>
<s>
The	O
Windows	O
Hello	O
driver	B-Application
included	O
in	O
a	O
firmware	B-Application
update	O
failed	O
to	O
properly	O
reinitialize	O
the	O
infrared	O
camera	O
after	O
waking	O
from	O
sleep	O
mode	O
,	O
causing	O
Windows	O
Hello	O
to	O
fail	O
until	O
a	O
reboot	B-Device
.	O
</s>
<s>
Firmware	B-Application
updates	O
were	O
issued	O
in	O
April	O
and	O
May	O
2016	O
to	O
fix	O
the	O
camera	O
.	O
</s>
<s>
An	O
additional	O
issue	O
raised	O
by	O
many	O
Surface	B-Device
owners	O
is	O
problems	O
with	O
expanding	O
lithium	O
batteries	O
that	O
causes	O
screen	O
discoloration	O
and	O
separation	O
of	O
the	O
screen	O
from	O
the	O
body	O
of	O
the	O
computer	O
.	O
</s>
<s>
The	O
design	O
of	O
the	O
Surface	B-Device
does	O
not	O
allow	O
for	O
the	O
battery	O
to	O
be	O
easily	O
exchanged	O
.	O
</s>
