<s>
The	O
following	O
is	O
a	O
list	O
of	O
filename	O
extensions	O
used	O
by	O
programs	O
in	O
the	O
Microsoft	B-Application
Office	I-Application
suite	I-Application
.	O
</s>
<s>
Legacy	O
Legacy	O
filename	O
extensions	O
denote	O
binary	O
Microsoft	B-Application
Word	I-Application
formatting	O
that	O
became	O
outdated	O
with	O
the	O
release	O
of	O
Microsoft	B-Application
Office	I-Application
2007	I-Application
.	O
</s>
<s>
Although	O
the	O
latest	O
version	O
of	O
Microsoft	B-Application
Word	I-Application
can	O
still	O
open	O
them	O
,	O
they	O
are	O
no	O
longer	O
developed	O
.	O
</s>
<s>
OOXML	B-Operating_System
Office	B-Operating_System
Open	I-Operating_System
XML	I-Operating_System
(	O
OOXML	B-Operating_System
)	O
format	O
was	O
introduced	O
with	O
Microsoft	B-Application
Office	I-Application
2007	I-Application
and	O
became	O
the	O
default	O
format	O
of	O
Microsoft	B-Application
Word	I-Application
ever	O
since	O
.	O
</s>
<s>
Legacy	O
Legacy	O
filename	O
extensions	O
denote	O
binary	O
Microsoft	B-Application
Excel	I-Application
formats	O
that	O
became	O
outdated	O
with	O
the	O
release	O
of	O
Microsoft	B-Application
Office	I-Application
2007	I-Application
.	O
</s>
<s>
Although	O
the	O
latest	O
version	O
of	O
Microsoft	B-Application
Excel	I-Application
can	O
still	O
open	O
them	O
,	O
they	O
are	O
no	O
longer	O
developed	O
.	O
</s>
<s>
OOXML	B-Operating_System
Office	B-Operating_System
Open	I-Operating_System
XML	I-Operating_System
(	O
OOXML	B-Operating_System
)	O
format	O
was	O
introduced	O
with	O
Microsoft	B-Application
Office	I-Application
2007	I-Application
and	O
became	O
the	O
default	O
format	O
of	O
Microsoft	B-Application
Excel	I-Application
ever	O
since	O
.	O
</s>
<s>
Excel-related	O
file	O
extensions	O
of	O
this	O
format	O
include	O
:	O
</s>
<s>
Other	O
formats	O
Microsoft	B-Application
Excel	I-Application
uses	O
dedicated	O
file	O
formats	O
that	O
are	O
not	O
part	O
of	O
OOXML	B-Operating_System
,	O
and	O
use	O
the	O
following	O
extensions	O
:	O
</s>
<s>
Microsoft	B-Application
Access	I-Application
2007	I-Application
introduced	O
new	O
file	O
extensions	O
:	O
</s>
<s>
.ACCDB	O
–	O
The	O
file	O
extension	O
for	O
the	O
new	O
Office	B-Application
Access	I-Application
2007	O
file	O
format	O
.	O
</s>
<s>
.ACCDE	O
–	O
The	O
file	O
extension	O
for	O
Office	B-Application
Access	I-Application
2007	O
files	O
that	O
are	O
in	O
"	O
execute	O
only	O
"	O
mode	O
.	O
</s>
<s>
ACCDE	O
files	O
have	O
all	O
Visual	B-Language
Basic	I-Language
for	I-Language
Applications	I-Language
(	O
VBA	B-Language
)	O
source	O
code	O
hidden	O
.	O
</s>
<s>
A	O
user	O
of	O
an	O
ACCDE	O
file	O
can	O
only	O
execute	O
VBA	B-Language
code	O
,	O
but	O
not	O
view	O
or	O
modify	O
it	O
.	O
</s>
<s>
.ACCDT	O
–	O
The	O
file	O
extension	O
for	O
Access	B-Application
Database	O
Templates	O
.	O
</s>
<s>
By	O
simply	O
changing	O
a	O
database	O
's	O
file	O
extension	O
from	O
.accdb	O
to	O
.accdr	O
,	O
you	O
can	O
create	O
a	O
"	O
locked-down	O
"	O
version	O
of	O
your	O
Office	B-Application
Access	I-Application
database	O
.	O
</s>
<s>
You	O
can	O
change	O
the	O
file	O
extension	O
back	O
to	O
.accdb	O
to	O
restore	O
full	O
functionality	O
.	O
</s>
<s>
.xps	O
–	O
a	O
XML-based	O
document	O
format	O
used	O
for	O
printing	O
(	O
on	O
Windows	O
Vista	O
and	O
later	O
)	O
and	O
preserving	O
documents	O
.	O
</s>
