<s>
APTonCD	B-Operating_System
is	O
a	O
tool	O
that	O
can	O
back	B-Protocol
up	I-Protocol
software	O
packages	O
(	O
.deb	O
files	O
)	O
downloaded	O
via	O
Advanced	B-Application
Packaging	I-Application
Tool	I-Application
(	O
APT	B-Application
)	O
or	O
aptitude	O
,	O
creating	O
a	O
repository	O
that	O
can	O
be	O
used	O
to	O
install	O
those	O
packages	O
on	O
other	O
computers	O
without	O
Internet	O
access	O
.	O
</s>
<s>
APTonCD	B-Operating_System
gathers	O
the	O
collected	O
packages	O
into	O
a	O
single	O
ISO	B-General_Concept
image	I-General_Concept
.	O
</s>
<s>
A	O
third-party	O
optical	B-Application
disc	I-Application
authoring	I-Application
tool	O
can	O
subsequently	O
write	O
the	O
ISO	B-General_Concept
image	I-General_Concept
to	O
a	O
disc	O
.	O
</s>
<s>
Since	O
APTonCD	B-Operating_System
just	O
copies	O
the	O
deb	O
files	O
on	O
the	O
cache	O
,	O
it	O
will	O
not	O
save	O
files	O
that	O
are	O
downloaded	O
when	O
the	O
.deb	O
packages	O
are	O
installed	O
,	O
this	O
causes	O
packages	O
like	O
"	O
ubuntu-restricted-extras	B-Operating_System
"	O
or	O
the	O
Flash	O
plugin	O
to	O
fail	O
when	O
installing	O
them	O
on	O
a	O
computer	O
with	O
no	O
internet	O
access	O
.	O
</s>
