<s>
On	O
computer	B-Device
keyboards	I-Device
,	O
the	O
enter	B-Device
key	I-Device
and	O
return	B-Device
key	I-Device
are	O
two	O
closely	O
related	O
keys	O
with	O
overlapping	O
and	O
distinct	O
functions	O
dependent	O
on	O
operating	B-General_Concept
system	I-General_Concept
and	O
application	B-Application
.	O
</s>
<s>
The	O
return	B-Device
key	I-Device
has	O
its	O
origins	O
in	O
two	O
typewriter	O
functions	O
:	O
carriage	O
return	O
,	O
which	O
would	O
reset	O
the	O
carriage	O
to	O
the	O
beginning	O
of	O
the	O
line	O
of	O
text	O
,	O
and	O
line	O
feed	O
,	O
which	O
would	O
advance	O
the	O
paper	O
one	O
line	O
downward	O
.	O
</s>
<s>
These	O
were	O
often	O
combined	O
into	O
a	O
single	O
return	B-Device
key	I-Device
,	O
a	O
convention	O
that	O
continues	O
in	O
modern	O
computer	O
word	B-General_Concept
processing	I-General_Concept
to	O
insert	O
a	O
paragraph	O
break	O
( ¶	O
)	O
.	O
</s>
<s>
The	O
enter	B-Device
key	I-Device
is	O
a	O
computer	O
innovation	O
,	O
which	O
in	O
most	O
cases	O
causes	O
a	O
command	B-Application
line	I-Application
,	O
window	O
form	O
,	O
or	O
dialog	O
box	O
to	O
operate	O
its	O
default	O
function	O
.	O
</s>
<s>
Additionally	O
,	O
it	O
can	O
act	O
as	O
the	O
equal	O
to	O
button	O
in	O
calculator	B-Application
programs	O
.	O
</s>
<s>
On	O
modern	O
computers	O
both	O
keys	O
generally	O
have	O
all	O
the	O
functions	O
of	O
the	O
other	O
,	O
allowing	O
for	O
either	O
key	O
to	O
be	O
used	O
,	O
or	O
even	O
for	O
them	O
to	O
be	O
combined	O
into	O
a	O
single	O
key	O
,	O
as	O
is	O
the	O
case	O
with	O
most	O
laptops	B-Device
.	O
</s>
<s>
Microsoft	B-Application
Windows	I-Application
makes	O
no	O
distinction	O
between	O
them	O
whatsoever	O
,	O
and	O
usually	O
both	O
keys	O
are	O
labelled	O
as	O
enter	O
on	O
Windows	O
keyboards	B-Device
with	O
the	O
United	O
States	O
layout	O
.	O
</s>
<s>
Other	O
operating	B-General_Concept
systems	I-General_Concept
,	O
such	O
as	O
Apple	O
's	O
Darwin-based	O
OSs	O
,	O
generally	O
treat	O
them	O
equivalently	O
while	O
still	O
maintaining	O
the	O
technical	O
and	O
descriptive	O
distinction	O
,	O
allowing	O
applications	O
to	O
treat	O
the	O
two	O
keys	O
differently	O
if	O
necessary	O
.	O
</s>
<s>
The	O
enter	B-Device
key	I-Device
is	O
typically	O
located	O
to	O
the	O
right	O
of	O
the	O
and	O
keys	O
on	O
the	O
lower	O
right	O
of	O
the	O
numeric	B-Device
keypad	I-Device
,	O
while	O
the	O
return	B-Device
key	I-Device
is	O
situated	O
on	O
the	O
right	O
edge	O
of	O
the	O
main	O
alphanumeric	O
portion	O
of	O
the	O
keyboard	B-Device
.	O
</s>
<s>
On	O
ISO	O
and	O
JIS	O
keyboards	B-Device
,	O
return	O
is	O
a	O
stepped	O
double-height	O
key	O
spanning	O
the	O
second	O
and	O
third	O
rows	O
,	O
below	O
and	O
above	O
the	O
right-hand	O
.	O
</s>
<s>
On	O
ANSI	O
keyboards	B-Device
it	O
is	O
wider	O
but	O
located	O
on	O
the	O
third	O
row	O
only	O
,	O
as	O
the	O
backslash	O
key	O
is	O
located	O
between	O
it	O
and	O
.	O
</s>
<s>
Some	O
variants	O
of	O
the	O
ANSI	O
keyboard	B-Device
layout	O
create	O
a	O
double-height	O
return	B-Device
key	I-Device
by	O
subsuming	O
the	O
backslash	O
key	O
into	O
it	O
.	O
</s>
<s>
However	O
,	O
this	O
requires	O
the	O
relocation	O
of	O
the	O
backslash	O
key	O
and	O
is	O
relatively	O
uncommon	O
on	O
modern	O
keyboards	B-Device
elsewhere	O
.	O
</s>
<s>
The	O
return	B-Device
key	I-Device
symbol	O
is	O
,	O
an	O
arrow	O
pointing	O
down	O
and	O
leftward	O
;	O
however	O
,	O
rendering	O
of	O
the	O
symbol	O
varies	O
greatly	O
by	O
typeface	O
,	O
with	O
it	O
appearing	O
hollow	O
in	O
some	O
or	O
with	O
an	O
additional	O
initial	O
rightward	O
bar	O
in	O
others	O
.	O
</s>
<s>
On	O
most	O
ISO	O
and	O
other	O
keyboards	B-Device
worldwide	O
the	O
return	B-Device
key	I-Device
is	O
labelled	O
solely	O
with	O
the	O
symbol	O
across	O
all	O
platforms	B-Device
.	O
</s>
<s>
Meanwhile	O
,	O
on	O
ANSI	O
US	O
keyboards	B-Device
it	O
is	O
labelled	O
as	O
by	O
Windows	O
OEMs	O
(	O
sometimes	O
even	O
without	O
the	O
return	O
symbol	O
)	O
and	O
as	O
by	O
Apple	O
.	O
</s>
<s>
For	O
enter	O
,	O
exists	O
in	O
Unicode	O
for	O
the	O
ISO	O
9995-7	O
enter	B-Device
key	I-Device
symbol	O
;	O
however	O
,	O
it	O
is	O
infrequently	O
used	O
,	O
one	O
example	O
being	O
the	O
French	O
Canadian	O
keyboard	B-Device
.	O
</s>
<s>
Windows	O
keyboards	B-Device
worldwide	O
tend	O
to	O
simply	O
label	O
the	O
key	O
with	O
the	O
text	O
,	O
while	O
Apple	O
uses	O
the	O
symbol	O
(	O
or	O
)	O
on	O
ISO	O
and	O
JIS	O
keyboards	B-Device
and	O
the	O
text	O
on	O
ANSI	O
US	O
keyboards	B-Device
;	O
this	O
is	O
acknowledged	O
by	O
an	O
annotation	O
"	O
enter	B-Device
key	I-Device
"	O
on	O
U+2324	O
in	O
the	O
Unicode	O
code	O
chart	O
.	O
</s>
<s>
On	O
IBM	O
's	O
3270	B-Operating_System
and	O
5250	B-Device
line	O
of	O
terminals	B-General_Concept
,	O
the	O
Enter	B-Device
key	I-Device
was	O
located	O
to	O
the	O
right	O
of	O
the	O
space	O
bar	O
and	O
was	O
used	O
to	O
send	O
the	O
contents	O
of	O
the	O
terminal	O
's	O
buffer	O
to	O
the	O
host	O
computer	O
.	O
</s>
<s>
The	O
Return	B-Device
key	I-Device
was	O
located	O
in	O
a	O
more	O
standard	O
location	O
and	O
was	O
used	O
to	O
generate	O
a	O
new	O
line	O
.	O
</s>
<s>
Apple	O
also	O
took	O
advantage	O
of	O
this	O
situation	O
to	O
create	O
an	O
editable	O
command	B-Application
line	I-Application
environment	I-Application
called	O
a	O
"	O
Worksheet	O
"	O
in	O
the	O
Macintosh	B-Operating_System
Programmer	I-Operating_System
's	I-Operating_System
Workshop	I-Operating_System
,	O
where	O
return	O
was	O
used	O
strictly	O
as	O
a	O
formatting	O
key	O
while	O
enter	O
was	O
used	O
to	O
execute	O
a	O
shell	O
command	O
or	O
series	O
of	O
commands	O
in	O
direct	B-Application
mode	I-Application
.	O
</s>
<s>
This	O
strict	O
dichotomy	O
has	O
since	O
been	O
relaxed	O
,	O
so	O
that	O
now	O
there	O
are	O
very	O
few	O
situations	O
within	O
macOS	B-Application
where	O
enter	O
and	O
return	O
are	O
not	O
equivalent	O
.	O
</s>
<s>
One	O
example	O
of	O
this	O
continued	O
division	O
of	O
use	O
is	O
the	O
type	O
tool	O
in	O
Adobe	B-Operating_System
Photoshop	I-Operating_System
,	O
where	O
the	O
return	B-Device
key	I-Device
produces	O
a	O
new	O
line	O
while	O
the	O
enter	B-Device
key	I-Device
ends	O
editing	O
mode	O
.	O
</s>
<s>
Another	O
is	O
Mathematica	B-Language
,	O
where	O
the	O
Return	B-Device
key	I-Device
creates	O
a	O
new	O
line	O
,	O
while	O
the	O
Enter	B-Device
key	I-Device
(	O
or	O
Shift-Return	O
)	O
submits	O
the	O
current	O
command	O
for	O
execution	O
.	O
</s>
<s>
For	O
example	O
,	O
the	O
Commodore	O
64	O
(	O
manufactured	O
from	O
1982	B-Application
)	O
had	O
only	O
the	O
"	O
Return	O
"	O
key	O
.	O
</s>
<s>
Most	O
laptop	B-Device
computers	I-Device
continue	O
in	O
this	O
combined	O
tradition	O
.	O
</s>
