<s>
T9	B-General_Concept
is	O
a	O
predictive	B-General_Concept
text	I-General_Concept
technology	O
for	O
mobile	O
phones	O
(	O
specifically	O
those	O
that	O
contain	O
a	O
3×4	O
numeric	O
keypad	O
)	O
,	O
originally	O
developed	O
by	O
Tegic	O
Communications	O
,	O
now	O
part	O
of	O
Nuance	O
Communications	O
.	O
</s>
<s>
T9	B-General_Concept
stands	O
for	O
Text	O
on	O
9	O
keys	O
.	O
</s>
<s>
T9	B-General_Concept
was	O
used	O
on	O
phones	O
from	O
Verizon	B-Application
,	O
NEC	O
,	O
Nokia	O
,	O
Samsung	O
Electronics	O
,	O
Siemens	O
,	O
Sony	O
Mobile	O
,	O
Sanyo	O
,	O
SAGEM	O
and	O
others	O
,	O
as	O
well	O
as	O
PDAs	B-Application
such	O
as	O
Avigo	B-Application
during	O
the	O
late	O
1990s	O
.	O
</s>
<s>
The	O
main	O
competing	O
technologies	O
include	O
iTap	O
created	O
by	O
Motorola	O
,	O
SureType	B-Application
created	O
by	O
RIM	O
,	O
Eatoni	O
's	O
LetterWise	O
and	O
WordWise	O
,	O
and	O
Intelab	O
's	O
Tauto	O
.	O
</s>
<s>
T9	B-General_Concept
is	O
not	O
available	O
on	O
Apple	O
devices	O
but	O
is	O
available	O
on	O
certain	O
inexpensive	O
phones	O
without	O
a	O
touchscreen	O
,	O
and	O
modern	O
Android	B-Application
phones	I-Application
where	O
it	O
can	O
be	O
used	O
to	O
dial	O
contacts	O
by	O
spelling	O
the	O
name	O
of	O
the	O
contact	O
one	O
is	O
trying	O
to	O
call	O
.	O
</s>
<s>
T9	B-General_Concept
's	O
objective	O
is	O
to	O
make	O
it	O
easier	O
to	O
enter	O
text	O
messages	O
.	O
</s>
<s>
T9	B-General_Concept
combines	O
the	O
groups	O
of	O
letters	O
on	O
each	O
phone	O
key	O
with	O
a	O
fast-access	O
dictionary	B-Operating_System
of	O
words	O
.	O
</s>
<s>
It	O
will	O
then	O
look	O
up	O
in	O
the	O
dictionary	B-Operating_System
all	O
words	O
corresponding	O
to	O
the	O
sequence	O
of	O
keypresses	O
and	O
order	O
them	O
by	O
frequency	O
of	O
use	O
.	O
</s>
<s>
As	O
T9	B-General_Concept
"	O
gains	O
familiarity	O
"	O
with	O
the	O
words	O
and	O
phrases	O
the	O
user	O
commonly	O
uses	O
,	O
it	O
speeds	O
up	O
the	O
process	O
by	O
offering	O
the	O
most	O
frequently	O
used	O
words	O
first	O
and	O
then	O
letting	O
the	O
user	O
access	O
other	O
choices	O
with	O
one	O
or	O
more	O
presses	O
of	O
a	O
predefined	O
"	O
Next	O
"	O
key	O
.	O
</s>
<s>
The	O
dictionary	B-Operating_System
is	O
expandable	O
.	O
</s>
<s>
After	O
introducing	O
a	O
new	O
word	O
,	O
the	O
next	O
time	O
the	O
user	O
tries	O
to	O
produce	O
that	O
word	O
,	O
T9	B-General_Concept
adds	O
it	O
to	O
the	O
predictive	O
dictionary	B-Operating_System
.	O
</s>
<s>
The	O
implementation	O
of	O
the	O
user	O
database	O
is	O
dependent	O
on	O
the	O
version	O
of	O
T9	B-General_Concept
and	O
how	O
T9	B-General_Concept
is	O
actually	O
integrated	O
on	O
the	O
device	O
.	O
</s>
<s>
Some	O
T9	B-General_Concept
implementations	O
feature	O
smart	O
punctuation	O
.	O
</s>
<s>
Depending	O
on	O
the	O
language	O
,	O
T9	B-General_Concept
also	O
supports	O
word	O
breaking	O
after	O
punctuation	O
to	O
support	O
clitics	O
such	O
as	O
l	O
 '	O
and	O
n	O
 '	O
in	O
French	O
and	O
'	O
s	O
in	O
English	O
.	O
</s>
<s>
In	O
later	O
versions	O
of	O
T9	B-General_Concept
,	O
the	O
order	O
of	O
the	O
words	O
presented	O
is	O
adapted	O
to	O
the	O
usage	O
pattern	O
.	O
</s>
<s>
T9	B-General_Concept
is	O
encoded	O
to	O
prefer	O
the	O
word	O
that	O
its	O
programmers	O
determined	O
to	O
be	O
the	O
most	O
common	O
textonym	O
,	O
such	O
as	O
"	O
good	O
"	O
over	O
"	O
home	O
"	O
or	O
"	O
gone	O
"	O
,	O
"	O
hand	O
"	O
over	O
"	O
game	O
"	O
,	O
or	O
"	O
bad	O
"	O
over	O
"	O
cad	O
"	O
or	O
"	O
ace	O
"	O
.	O
</s>
<s>
In	O
later	O
versions	O
of	O
T9	B-General_Concept
,	O
the	O
user	O
can	O
select	O
a	O
primary	O
and	O
secondary	O
language	O
and	O
access	O
matches	O
from	O
both	O
languages	O
.	O
</s>
<s>
T9	B-General_Concept
can	O
automatically	O
recognize	O
and	O
correct	O
typing/texting	O
errors	O
,	O
by	O
looking	O
at	O
neighboring	O
keys	O
on	O
the	O
keypad	O
to	O
determine	O
an	O
incorrect	O
keypress	O
.	O
</s>
<s>
"	O
8278494	O
"	O
,	O
results	O
in	O
T9	B-General_Concept
suggesting	O
the	O
words	O
"	O
tasting	O
"	O
(	O
8278464	O
)	O
,	O
"	O
testing	O
"	O
(	O
8378464	O
)	O
,	O
and	O
"	O
tapping	O
"	O
(	O
8277464	O
)	O
.	O
</s>
<s>
In	O
order	O
to	O
achieve	O
compression	O
ratios	O
of	O
close	O
to	O
1	O
byte	O
per	O
word	O
,	O
T9	B-General_Concept
uses	O
an	O
optimized	O
algorithm	O
that	O
maintains	O
word	O
order	O
and	O
partial	O
words	O
(	O
also	O
known	O
as	O
stems	O
)	O
;	O
however	O
,	O
because	O
of	O
this	O
compression	O
,	O
it	O
over-generates	O
words	O
that	O
are	O
sometimes	O
visible	O
as	O
"	O
junk	O
words	O
"	O
.	O
</s>
<s>
Many	O
smart	O
keyboards	O
now	O
exist	O
,	O
such	O
as	O
Swype	B-Language
or	O
Swiftkey	B-Device
,	O
that	O
have	O
taken	O
the	O
idea	O
of	O
T9	B-General_Concept
and	O
married	O
it	O
with	O
the	O
advanced	O
touchscreen	O
technology	O
found	O
in	O
Android	B-Application
phones	I-Application
and	O
iPhones	B-Device
.	O
</s>
<s>
These	O
advances	O
have	O
made	O
T9	B-General_Concept
obsolete	O
in	O
newer	O
cellphones	O
for	O
many	O
users	O
,	O
since	O
it	O
is	O
predicated	O
on	O
the	O
use	O
of	O
a	O
keypad	O
with	O
nothing	O
besides	O
numbers	O
,	O
the	O
asterisk	O
and	O
the	O
pound	O
key	O
(	O
known	O
as	O
the	O
hash	O
key	O
in	O
Commonwealth	O
countries	O
)	O
.	O
</s>
<s>
Many	O
features	O
,	O
such	O
as	O
predictive	B-General_Concept
text	I-General_Concept
,	O
have	O
been	O
adopted	O
by	O
and	O
improved	O
by	O
future	O
generations	O
of	O
keyboard	O
software	O
.	O
</s>
<s>
However	O
,	O
T9	B-General_Concept
remains	O
viable	O
.	O
</s>
<s>
For	O
example	O
,	O
those	O
with	O
larger	O
fingertips	O
still	O
use	O
the	O
T9	B-General_Concept
based	O
keyboard	O
on	O
smartphones	O
for	O
text	O
entry	O
,	O
because	O
key	O
press	O
accuracy	O
increases	O
with	O
the	O
larger	O
screen	O
area	O
per	O
key	O
on	O
a	O
numeric-style	O
4×3	O
keyboard	O
.	O
</s>
<s>
Such	O
T9	B-General_Concept
formats	O
for	O
text	O
entry	O
therefore	O
remain	O
available	O
in	O
all	O
latest	O
[	O
as	O
of	O
August	O
2020 ]	O
iterations	O
of	O
LG	O
keyboards	O
,	O
certain	O
Samsung	O
keyboards	O
,	O
and	O
third	O
party	O
T9	B-General_Concept
keyboards	O
such	O
as	O
Go	O
keyboard	O
for	O
Androids	B-Application
and	O
Type	O
Nine	O
for	O
iPhones	B-Device
,	O
as	O
shown	O
on	O
this	O
LG	O
V60	O
.	O
</s>
