<s>
Client-side	B-Protocol
persistent	I-Protocol
data	I-Protocol
or	O
CSPD	O
is	O
a	O
term	O
used	O
in	O
computing	O
for	O
storing	O
data	O
required	O
by	O
web	O
applications	O
to	O
complete	O
internet	O
tasks	O
on	O
the	O
client-side	B-Operating_System
as	O
needed	O
rather	O
than	O
exclusively	O
on	O
the	O
server	O
.	O
</s>
<s>
As	O
a	O
framework	O
it	O
is	O
one	O
solution	O
to	O
the	O
needs	O
of	O
Occasionally	B-Architecture
connected	I-Architecture
computing	I-Architecture
or	O
OCC	O
.	O
</s>
<s>
A	O
major	O
challenge	O
for	O
HTTP	B-Protocol
as	O
a	O
stateless	B-Protocol
protocol	I-Protocol
has	O
been	O
asynchronous	O
tasks	O
.	O
</s>
<s>
The	O
AJAX	B-General_Concept
pattern	O
using	O
XMLHttpRequest	B-Protocol
was	O
first	O
introduced	O
by	O
Microsoft	O
in	O
the	O
context	O
of	O
the	O
Outlook	B-Protocol
e-mail	O
product	O
.	O
</s>
<s>
The	O
first	O
CSPD	O
were	O
the	O
'	O
cookies	O
 '	O
introduced	O
by	O
the	O
Netscape	B-Protocol
Navigator	B-Protocol
.	O
</s>
<s>
ActiveX	B-Application
components	I-Application
which	O
have	O
entries	O
in	O
the	O
Windows	B-Protocol
registry	I-Protocol
can	O
also	O
be	O
viewed	O
as	O
a	O
form	O
of	O
client-side	B-Operating_System
persistence	B-Application
.	O
</s>
