<s>
A	O
single-core	B-Operating_System
processor	O
is	O
a	O
microprocessor	O
with	O
a	O
single	O
core	O
on	O
its	O
die	O
.	O
</s>
<s>
It	O
performs	O
the	O
fetch-decode-execute	B-General_Concept
cycle	I-General_Concept
once	O
per	O
clock-cycle	O
,	O
as	O
it	O
only	O
runs	O
on	O
one	O
thread	O
.	O
</s>
<s>
A	O
computer	O
using	O
a	O
single	O
core	O
CPU	B-Device
is	O
generally	O
slower	O
than	O
a	O
multi-core	B-Architecture
system	O
.	O
</s>
<s>
Windows	O
supported	O
single-core	B-Operating_System
processors	O
up	O
until	O
the	O
release	O
of	O
Windows	B-Application
11	I-Application
,	O
where	O
a	O
dual-core	B-Architecture
processor	I-Architecture
is	O
required	O
.	O
</s>
<s>
Windows	B-Device
98	I-Device
)	O
cannot	O
gain	O
any	O
benefit	O
from	O
multi-core	B-Architecture
processors	I-Architecture
.	O
</s>
<s>
Single	O
core	O
processors	O
are	O
also	O
used	O
in	O
hobbyist	O
computers	O
like	O
the	O
Raspberry	B-Operating_System
Pi	I-Operating_System
and	O
Single-board	B-Device
microcontrollers	I-Device
.	O
</s>
<s>
The	O
production	O
of	O
single-core	B-Operating_System
desktop	O
processors	O
ended	O
in	O
2013	O
with	O
the	O
Celeron	B-Device
G470	O
.	O
</s>
<s>
The	O
first	O
single	O
core	O
processor	O
was	O
the	O
Intel	B-General_Concept
4004	I-General_Concept
,	O
which	O
was	O
commercially	O
released	O
on	O
November	O
15	O
,	O
1971	O
by	O
Intel	O
.	O
</s>
<s>
Since	O
then	O
many	O
improvements	O
have	O
been	O
made	O
to	O
single	O
core	O
processors	O
,	O
going	O
from	O
the	O
740	O
KHz	O
of	O
the	O
Intel	B-General_Concept
4004	I-General_Concept
to	O
the	O
2	O
GHz	O
Celeron	B-Device
G470	O
.	O
</s>
<s>
Single	O
core	O
processors	O
draw	O
less	O
power	O
than	O
larger	O
,	O
multi-core	B-Architecture
processors	I-Architecture
.	O
</s>
<s>
Single	O
core	O
processors	O
can	O
be	O
made	O
a	O
lot	O
more	O
cheaply	O
than	O
multi	B-Architecture
core	I-Architecture
systems	O
,	O
meaning	O
they	O
can	O
be	O
used	O
in	O
embedded	O
systems	O
.	O
</s>
<s>
Single	O
core	O
processors	O
are	O
generally	O
outperformed	O
by	O
multi-core	B-Architecture
processors	I-Architecture
.	O
</s>
<s>
Single	O
core	O
processors	O
are	O
more	O
likely	O
to	O
bottleneck	O
with	O
faster	O
peripheral	O
components	O
,	O
as	O
these	O
components	O
have	O
to	O
wait	O
for	O
the	O
CPU	B-Device
to	O
finish	O
its	O
cycle	O
.	O
</s>
<s>
This	O
reduces	O
performance	O
as	O
other	O
processes	O
have	O
to	O
wait	O
for	O
processor	O
time	O
,	O
leading	O
to	O
process	B-Operating_System
starvation	I-Operating_System
.	O
</s>
<s>
Single-core	B-Operating_System
one	O
processor	O
on	O
a	O
die	O
.	O
</s>
<s>
Since	O
about	O
2012	O
,	O
even	O
most	O
smartphones	B-Application
CPUs	B-Device
marketed	O
are	O
no	O
longer	O
single-core	B-Operating_System
;	O
Microcontrollers	B-Architecture
are	O
still	O
single-core	B-Operating_System
,	O
while	O
there	O
are	O
exceptions	O
.	O
</s>
<s>
Multi-core	B-Architecture
processors	I-Architecture
a	O
'	O
few	O
 '	O
processors	O
on	O
a	O
die	O
,	O
e.g.	O
</s>
<s>
Manycore	B-General_Concept
processors	I-General_Concept
a	O
'	O
large	O
number	O
 '	O
of	O
processors	O
on	O
a	O
die	O
,	O
e.g.	O
</s>
<s>
Some	O
specialist	O
ASICs/Accelerators	O
and	O
GPUs	B-Architecture
fall	O
into	O
this	O
category	O
.	O
</s>
