<s>
Google	B-Application
Developers	O
(	O
previously	O
Google	B-Protocol
Code	I-Protocol
)	O
,	O
application	B-Application
programming	I-Application
interfaces	I-Application
(	O
APIs	B-General_Concept
)	O
,	O
and	O
technical	O
resources	O
.	O
</s>
<s>
The	O
site	O
contains	O
documentation	O
on	O
using	O
Google	B-Application
developer	O
tools	O
and	O
APIs	B-General_Concept
—	O
including	O
discussion	O
groups	O
and	O
blogs	O
for	O
developers	O
using	O
Google	B-Application
's	I-Application
developer	O
products	O
.	O
</s>
<s>
There	O
are	O
APIs	B-General_Concept
offered	O
for	O
almost	O
all	O
of	O
Google	B-Application
's	I-Application
popular	O
consumer	O
products	O
,	O
like	O
Google	B-Application
Maps	I-Application
,	O
YouTube	B-General_Concept
,	O
Google	B-Application
Apps	I-Application
,	O
and	O
others	O
.	O
</s>
<s>
Google	B-Application
App	I-Application
Engine	I-Application
is	O
a	O
hosting	O
service	O
for	O
web	O
apps	O
.	O
</s>
<s>
Project	O
Hosting	O
gives	O
users	O
version	B-Architecture
control	I-Architecture
for	O
open	B-Application
source	I-Application
code	I-Application
.	O
</s>
<s>
Google	B-Language
Web	I-Language
Toolkit	I-Language
(	O
GWT	O
)	O
allows	O
developers	O
to	O
create	O
Ajax	B-General_Concept
applications	O
in	O
the	O
Java	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
The	O
site	O
contains	O
reference	O
information	O
for	O
community	O
based	O
developer	O
products	O
that	O
Google	B-Application
is	O
involved	O
with	O
like	O
Android	B-Application
from	O
the	O
Open	O
Handset	O
Alliance	O
and	O
OpenSocial	B-Application
from	O
the	O
OpenSocial	B-Application
Foundation	I-Application
.	O
</s>
<s>
Google	B-Application
offers	O
a	O
variety	O
of	O
APIs	B-General_Concept
,	O
mostly	O
web	B-General_Concept
APIs	I-General_Concept
for	O
web	O
developers	O
.	O
</s>
<s>
The	O
APIs	B-General_Concept
are	O
based	O
on	O
popular	O
Google	B-Application
consumer	O
products	O
,	O
including	O
Google	B-Application
Maps	I-Application
,	O
Google	B-Application
Earth	I-Application
,	O
AdSense	O
,	O
Adwords	B-Application
,	O
Google	B-Application
Apps	I-Application
and	O
YouTube	B-General_Concept
.	I-General_Concept
</s>
<s>
The	B-Application
Google	I-Application
Data	O
APIs	B-General_Concept
allow	O
programmers	O
to	O
create	O
applications	O
that	O
read	O
and	O
write	O
data	O
from	O
Google	B-Application
services	I-Application
.	O
</s>
<s>
Currently	O
,	O
these	O
include	O
APIs	B-General_Concept
for	O
Google	B-Application
Apps	I-Application
,	O
Google	B-Application
Analytics	I-Application
,	O
Blogger	B-Application
,	O
Google	B-Application
Base	O
,	O
Google	B-Application
Book	I-Application
Search	I-Application
,	O
Google	B-Application
Calendar	I-Application
,	O
Google	B-Application
Code	I-Application
Search	I-Application
,	O
Google	B-Application
Earth	I-Application
,	O
Google	B-Language
Spreadsheets	I-Language
,	O
Google	B-Operating_System
Notebook	I-Operating_System
,	O
</s>
<s>
Google	B-Application
's	I-Application
Ajax	B-General_Concept
APIs	B-General_Concept
let	O
a	O
developer	O
implement	O
rich	O
,	O
dynamic	O
websites	O
entirely	O
in	O
JavaScript	B-Language
and	O
HTML	B-Language
.	O
</s>
<s>
A	O
developer	O
can	O
create	O
a	O
map	O
to	O
a	O
site	O
,	O
a	O
dynamic	O
search	O
box	O
,	O
or	O
download	O
feeds	O
with	O
just	O
a	O
few	O
lines	O
of	O
javascript	B-Language
.	O
</s>
<s>
The	O
AdSense	O
and	O
AdWords	B-Application
APIs	B-General_Concept
,	O
based	O
on	O
the	O
SOAP	B-Application
data	O
exchange	O
standard	O
,	O
allow	O
developers	O
to	O
integrate	O
their	O
own	O
applications	O
with	O
these	O
Google	B-Application
services	I-Application
.	O
</s>
<s>
The	O
AdSense	O
API	B-General_Concept
allows	O
owners	O
of	O
websites	O
and	O
blogs	O
to	O
manage	O
AdSense	O
sign-up	O
,	O
content	O
and	O
reporting	O
,	O
while	O
the	O
AdWords	B-Application
API	B-General_Concept
gives	O
AdWords	B-Application
customers	O
programmatic	O
access	O
to	O
their	O
AdWords	B-Application
accounts	O
and	O
campaigns	O
.	O
</s>
<s>
Google	B-Application
App	I-Application
Engine	I-Application
lets	O
developers	O
run	O
web	O
applications	O
on	O
Google	B-Application
Cloud	O
.	O
</s>
<s>
Google	B-Application
App	I-Application
Engine	I-Application
supports	O
apps	O
written	O
in	O
several	O
programming	O
languages	O
.	O
</s>
<s>
With	O
App	B-Application
Engine	I-Application
's	O
Java	B-Language
runtime	O
environment	O
,	O
one	O
can	O
build	O
their	O
app	O
using	O
standard	O
Java	B-Language
technologies	I-Language
,	O
including	O
the	O
JVM	O
,	O
Java	B-Language
servlets	O
,	O
and	O
the	O
Java	B-Language
programming	I-Language
language	I-Language
—	O
or	O
any	O
other	O
language	O
using	O
a	O
JVM-based	O
interpreter	O
or	O
compiler	O
,	O
such	O
as	O
JavaScript	B-Language
or	O
Ruby	O
.	O
</s>
<s>
App	B-Application
Engine	I-Application
also	O
features	O
a	O
dedicated	O
Python	O
runtime	O
environment	O
,	O
which	O
includes	O
a	O
fast	O
Python	O
interpreter	O
and	O
the	O
Python	O
standard	O
library	O
.	O
</s>
<s>
Google	B-Application
Plugin	I-Application
for	I-Application
Eclipse	I-Application
(	O
GPE	O
)	O
is	O
a	O
set	O
of	O
software	O
development	B-General_Concept
tools	O
that	O
enables	O
Java	B-Language
developers	O
to	O
design	O
,	O
build	O
,	O
optimize	O
,	O
and	O
deploy	O
cloud	B-Architecture
computing	I-Architecture
applications	O
.	O
</s>
<s>
GPE	O
assists	O
developers	O
in	O
creating	O
complex	O
user	O
interfaces	O
,	O
generating	O
Ajax	B-General_Concept
code	O
using	O
the	B-Application
Google	I-Application
Web	O
Toolkit	O
,	O
optimizing	O
performance	O
with	O
Speed	O
Tracer	O
,	O
and	O
deploying	O
applications	O
to	O
Google	B-Application
App	I-Application
Engine	I-Application
.	O
</s>
<s>
GPE	O
installs	O
into	O
the	O
Eclipse	B-Application
integrated	B-Application
development	I-Application
environment	I-Application
(	O
IDE	B-Application
)	O
using	O
the	O
extensible	O
plugin	B-Application
system	O
.	O
</s>
<s>
GPE	O
is	O
available	O
under	O
the	B-Application
Google	I-Application
terms	O
of	O
service	O
license	O
.	O
</s>
<s>
The	B-Application
Google	I-Application
Web	O
Toolkit	O
(	O
GWT	O
)	O
is	O
an	O
open	B-Application
source	I-Application
toolkit	O
allowing	O
developers	O
to	O
create	O
Ajax	B-General_Concept
applications	O
in	O
the	O
Java	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
GWT	O
supports	O
rapid	O
client	B-Operating_System
–	I-Operating_System
server	I-Operating_System
development	B-General_Concept
and	O
debugging	O
in	O
any	O
Java	B-Language
IDE	B-Application
.	O
</s>
<s>
In	O
a	O
subsequent	O
deployment	O
step	O
,	O
the	O
GWT	O
compiler	O
translates	O
a	O
working	O
Java	B-Language
application	O
into	O
equivalent	O
JavaScript	B-Language
that	O
programmatically	O
manipulates	O
a	O
web	B-Application
browser	I-Application
's	I-Application
HTML	B-General_Concept
DOM	I-General_Concept
using	O
DHTML	B-General_Concept
techniques	O
.	O
</s>
<s>
GWT	O
emphasizes	O
reusable	O
,	O
efficient	O
solutions	O
to	O
recurring	O
Ajax	B-General_Concept
challenges	O
,	O
namely	O
asynchronous	B-Operating_System
remote	I-Operating_System
procedure	I-Operating_System
calls	I-Operating_System
,	O
history	O
management	O
,	O
bookmarking	O
,	O
and	O
cross-browser	O
portability	O
.	O
</s>
<s>
It	O
is	O
released	O
under	O
the	O
Apache	B-Application
License	I-Application
version	O
2.0	O
.	O
</s>
<s>
Google	B-Application
OR-Tools	O
provides	O
programming	O
language	O
wrappers	O
for	O
operations	O
research	O
tools	O
such	O
as	O
optimisation	O
and	O
constraint	B-Application
solving	I-Application
.	O
</s>
<s>
Google	B-Application
previously	O
ran	O
a	O
project	O
hosting	O
service	O
called	O
Google	B-Protocol
Code	I-Protocol
that	O
provided	O
revision	B-Architecture
control	I-Architecture
offering	O
Subversion	B-Application
,	O
Mercurial	B-Protocol
and	O
Git	B-Application
(	O
transparently	O
implemented	O
using	O
Bigtable	B-Application
as	O
storage	O
)	O
,	O
an	O
issue	O
tracker	O
,	O
and	O
a	O
wiki	O
for	O
documentation	O
.	O
</s>
<s>
The	O
service	O
was	O
available	O
and	O
free	O
for	O
all	O
OSI-approved	O
Open	B-Application
Source	I-Application
projects	O
(	O
as	O
of	O
2010	O
,	O
it	O
was	O
strongly	O
recommended	O
but	O
no	O
longer	O
required	O
to	O
use	O
one	O
of	O
the	O
nine	O
well-known	O
open	B-Application
source	I-Application
licenses	O
:	O
Apache	B-Application
,	O
Artistic	B-License
,	O
BSD	B-Operating_System
,	O
GPLv2	O
,	O
GPLv3	O
,	O
LGPL	B-Application
,	O
MIT	B-License
,	O
MPL	B-License
and	O
EPL	B-License
)	O
.	O
</s>
<s>
In	O
March	O
2015	O
,	O
Google	B-Application
announced	O
that	O
it	O
would	O
be	O
closing	O
down	O
Google	B-Protocol
Code	I-Protocol
on	O
January	O
15	O
,	O
2016	O
.	O
</s>
<s>
All	O
projects	O
on	O
the	O
site	O
entered	O
read-only	O
mode	O
on	O
August	O
24	O
,	O
2015	O
,	O
with	O
the	O
exception	O
of	O
certain	O
Google-owned	O
projects	O
including	O
Android	B-Application
and	O
Chrome	O
.	O
</s>
<s>
Residents	O
of	O
countries	O
on	O
the	O
United	O
States	O
Office	O
of	O
Foreign	O
Assets	O
Control	O
sanction	O
list	O
,	O
including	O
Cuba	O
,	O
Iran	O
,	O
North	O
Korea	O
,	O
Sudan	O
and	O
Syria	O
,	O
were	O
prohibited	O
from	O
posting	O
to	O
or	O
accessing	O
Google	B-Protocol
Code	I-Protocol
.	O
</s>
<s>
Gears	O
was	O
beta	O
software	O
offered	O
by	O
Google	B-Application
to	O
enable	O
offline	O
access	O
to	O
services	O
that	O
normally	O
only	O
work	O
online	O
.	O
</s>
<s>
It	O
installed	O
a	O
database	O
engine	O
,	O
based	O
on	O
SQLite	B-Language
,	O
on	O
the	O
client	O
system	O
to	O
cache	O
data	O
locally	O
.	O
</s>
<s>
Google	B-Application
announced	O
the	O
end	O
of	O
Gears	O
development	B-General_Concept
on	O
March	O
11	O
,	O
2011	O
,	O
citing	O
a	O
shift	O
of	O
focus	O
from	O
Gears	O
to	O
HTML5	B-Application
.	O
</s>
<s>
Google	B-Application
I/O	I-Application
is	O
Google	B-Application
's	I-Application
largest	O
developer	O
event	O
,	O
which	O
,	O
usually	O
is	O
held	O
in	O
May	O
at	O
the	O
Shoreline	O
Amphitheatre	O
,	O
Mountain	O
View	O
.	O
</s>
<s>
Google	B-Application
Summer	I-Application
of	I-Application
Code	I-Application
is	O
a	O
mentoring	O
program	O
to	O
find	O
students	O
for	O
open	B-Application
source	I-Application
projects	O
.	O
</s>
<s>
Google	B-Application
Code	I-Application
Jam	I-Application
is	O
an	O
international	O
programming	O
competition	O
.	O
</s>
<s>
Google	B-Application
Developer	O
Groups	O
(	O
GDGs	O
)	O
are	O
communities	O
of	O
developers	O
who	O
are	O
interested	O
in	O
Google	B-Application
's	I-Application
developer	O
technology	O
products	O
and	O
platforms	O
.	O
</s>
