<s>
A	O
package	B-Application
format	I-Application
is	O
a	O
type	O
of	O
archive	B-Application
containing	O
computer	O
programs	O
and	O
additional	O
metadata	O
needed	O
by	O
package	B-Application
managers	I-Application
.	O
</s>
<s>
While	O
the	O
archive	B-Application
file	I-Application
format	O
itself	O
may	O
be	O
unchanged	O
,	O
package	B-Application
formats	I-Application
bear	O
additional	O
metadata	O
,	O
such	O
as	O
a	O
manifest	O
file	O
or	O
certain	O
directory	O
layouts	O
.	O
</s>
<s>
Packages	O
may	O
contain	O
either	O
source	O
code	O
or	O
executable	B-Application
files	I-Application
.	O
</s>
<s>
Packages	O
may	O
be	O
converted	O
from	O
one	O
type	O
to	O
another	O
with	O
software	O
such	O
as	O
Alien	B-Language
.	O
</s>
<s>
FormatConsumed	O
by	O
AAB	B-Application
Android	B-Application
AIR	B-Operating_System
Adobe	O
AIRAPK	O
(	O
Alpine	O
)	O
Alpine	O
LinuxAPK	O
(	O
Android	B-Application
)	O
AndroidAppImageLinux	O
distribution-agnostic	O
.	O
</s>
<s>
Arch	O
Linux	O
's	O
Pacman	O
and	O
Slackware	B-Application
use	O
Tar	B-Application
archives	I-Application
with	I-Application
generic	I-Application
naming	I-Application
but	O
specific	O
internal	O
structures	O
.	O
</s>
