<s>
The	O
Sun	B-Application
Java	I-Application
System	I-Application
Calendar	I-Application
Server	I-Application
was	O
Sun	O
's	O
calendar	B-Application
(	O
scheduling	B-Application
)	O
server	O
.	O
</s>
<s>
The	O
currently	O
available	O
version	O
is	O
6.3	O
which	O
is	O
now	O
part	O
of	O
the	O
Sun	B-Protocol
Java	I-Protocol
System	I-Protocol
Communications	I-Protocol
Suite	I-Protocol
.	O
</s>
<s>
Users	O
can	O
access	O
their	O
calendar	B-Application
and	O
task	O
list	O
items	O
using	O
a	O
variety	O
of	O
clients	O
.	O
</s>
<s>
Web	O
browsers	O
will	O
be	O
able	O
to	O
access	O
Calendar	B-Application
data	O
using	O
Sun	B-Language
Java	I-Language
System	I-Language
Communications	I-Language
Express	I-Language
as	O
an	O
HTML-based	O
client	O
.	O
</s>
<s>
Microsoft	B-Application
Outlook	I-Application
users	O
can	O
access	O
their	O
calendar	B-Application
data	O
using	O
the	O
Sun	B-Application
Java	I-Application
System	I-Application
Connector	O
for	O
Microsoft	B-Application
Outlook	I-Application
,	O
which	O
is	O
not	O
yet	O
compatible	O
with	O
Outlook	O
2010	O
.	O
</s>
<s>
Mozilla	B-Application
Thunderbird	I-Application
users	O
can	O
add	O
fully	O
functional	O
calendar	B-Application
access	O
to	O
the	O
Sun	O
Calendar	B-Application
Server	O
to	O
the	O
email	O
software	O
by	O
adding	O
the	O
Mozilla	B-Language
Lightning	I-Language
extension	O
for	O
WCAP	O
(	O
Web	B-Application
Calendar	I-Application
Access	O
Protocol	O
)	O
.	O
</s>
<s>
Finally	O
,	O
starting	O
in	O
2008	O
,	O
the	O
Sun	B-Protocol
Java	I-Protocol
System	I-Protocol
Communications	I-Protocol
Suite	I-Protocol
6	O
will	O
include	O
an	O
AJAX-based	O
Web	O
client	O
which	O
will	O
provide	O
better	O
"	O
thick	O
client-like	O
"	O
user	O
interactions	O
.	O
</s>
<s>
A	O
useful	O
feature	O
of	O
Calendar	B-Application
Server	O
is	O
the	O
notification	O
service	O
.	O
</s>
<s>
This	O
service	O
will	O
send	O
an	O
e-mail	O
or	O
an	O
SMS	O
to	O
the	O
calendar	B-Application
owner	O
.	O
</s>
<s>
These	O
messages	O
are	O
sent	O
to	O
the	O
calendar	B-Application
owner	O
if	O
he/she	O
has	O
been	O
invited	O
to	O
an	O
appointment	O
or	O
as	O
a	O
reminder	O
of	O
an	O
upcoming	O
appointment	O
.	O
</s>
<s>
Calendar	B-Application
reminders	O
and	O
change	O
events	O
are	O
published	O
to	O
a	O
Java	B-Language
Message	I-Language
Service	I-Language
using	O
Sun	B-Application
Java	I-Application
System	I-Application
Message	O
Queue	O
.	O
</s>
<s>
Developers	O
may	O
use	O
the	O
WCAP	O
interface	O
to	O
write	O
their	O
own	O
applications	O
which	O
access	O
calendars	B-Application
,	O
tasks	O
,	O
and	O
look	O
up	O
"	O
free	O
busy	O
"	O
information	O
on	O
users	O
.	O
</s>
<s>
This	O
interface	O
returns	O
calendar	B-Application
data	O
in	O
a	O
number	O
of	O
formats	O
including	O
XML	B-Protocol
and	O
iCalendar	O
.	O
</s>
<s>
JSON	B-General_Concept
(	O
JavaScript	B-General_Concept
Object	I-General_Concept
Notation	I-General_Concept
)	O
format	O
was	O
added	O
to	O
support	O
AJAX	O
development	O
in	O
the	O
latest	O
patch	O
of	O
Calendar	B-Application
Server	O
6.3	O
.	O
</s>
<s>
Sun	O
's	O
Java	O
System	O
Calendar	B-Application
Server	O
has	O
a	O
long	O
history	O
,	O
drawing	O
technology	O
from	O
Sun	O
Internet	O
Calendar	B-Application
Server	O
(	O
SICS	O
)	O
and	O
Netscape	O
Calendar	B-Application
Server	O
(	O
NCS	O
)	O
.	O
</s>
<s>
The	O
software	O
has	O
undergone	O
several	O
name	O
changes	O
;	O
in	O
addition	O
to	O
the	O
above	O
,	O
it	O
has	O
also	O
been	O
marketed	O
as	O
iPlanet	B-Application
Calendar	I-Application
Server	I-Application
and	O
Sun	B-Application
ONE	I-Application
Calendar	I-Application
Server	I-Application
.	O
</s>
<s>
Since	O
2003	O
,	O
the	O
Calendar	B-Application
Server	O
has	O
been	O
included	O
as	O
part	O
of	O
Sun	O
's	O
Java	B-Application
Enterprise	I-Application
System	I-Application
,	O
a	O
collection	O
of	O
infrastructure	O
software	O
applications	O
and	O
tools	O
.	O
</s>
<s>
It	O
is	O
also	O
available	O
as	O
part	O
of	O
the	O
Sun	B-Protocol
Java	I-Protocol
System	I-Protocol
Communications	I-Protocol
Suite	I-Protocol
,	O
a	O
smaller	O
collection	O
of	O
messaging	O
and	O
collaboration	O
services	O
that	O
includes	O
Sun	B-Application
Java	I-Application
System	I-Application
Messaging	I-Application
Server	I-Application
,	O
Sun	B-Application
Java	I-Application
System	I-Application
Instant	O
Messaging	O
Server	O
,	O
and	O
Sun	B-Language
Java	I-Language
System	I-Language
Communications	I-Language
Express	I-Language
.	O
</s>
<s>
Supporting	O
server	O
software	O
for	O
the	O
Calendar	B-Application
Server	O
includes	O
Sun	B-Application
Java	I-Application
System	I-Application
Directory	I-Application
Server	I-Application
,	O
Sun	B-Language
Java	I-Language
System	I-Language
Access	I-Language
Manager	I-Language
,	O
and	O
Sun	B-Language
Java	I-Language
System	I-Language
Web	I-Language
Server	I-Language
.	O
</s>
<s>
Calendar	B-Application
Express	O
was	O
the	O
original	O
web-based	O
client	O
interface	O
for	O
the	O
Calendar	B-Application
Server	O
.	O
</s>
<s>
This	O
HTML	B-Language
client	O
allowed	O
Calendar	B-Application
owners	O
to	O
create	O
appointments	O
,	O
invite	O
others	O
to	O
meetings	O
,	O
and	O
to	O
subscribe	O
to	O
other	O
calendars	B-Application
.	O
</s>
<s>
The	O
Calendar	B-Application
Express	O
web-client	O
was	O
dropped	O
from	O
support	O
starting	O
with	O
Sun	B-Application
Java	I-Application
System	I-Application
Calendar	I-Application
Server	I-Application
6.3	O
.	O
</s>
<s>
This	O
client	O
functionality	O
has	O
been	O
replaced	O
by	O
Sun	B-Language
Java	I-Language
System	I-Language
Communications	I-Language
Express	I-Language
.	O
</s>
<s>
The	O
Calendar	B-Application
Server	O
version	O
6.3	O
is	O
supported	O
on	O
multiple	O
operating	B-General_Concept
systems	I-General_Concept
including	O
Sun	O
's	O
Solaris	B-Application
and	O
Red	O
Hat	O
Enterprise	O
Linux	O
.	O
</s>
<s>
HP-UX	B-Application
and	O
Microsoft	B-Application
Windows	I-Application
have	O
since	O
been	O
dropped	O
from	O
support	O
starting	O
with	O
version	O
6.3	O
.	O
</s>
