<s>
In	O
the	O
Unix	B-Application
shells	I-Application
ksh	B-Language
,	O
bash	B-Operating_System
,	O
fish	B-Language
and	O
zsh	B-Application
,	O
the	O
disown	B-Application
builtin	O
command	O
is	O
used	O
to	O
remove	B-Operating_System
jobs	I-Operating_System
from	O
the	O
job	O
table	O
,	O
or	O
to	O
mark	O
jobs	O
so	O
that	O
a	O
SIGHUP	B-General_Concept
signal	O
is	O
not	O
sent	O
to	O
them	O
if	O
the	O
parent	O
shell	O
receives	O
it	O
(	O
e.g.	O
</s>
<s>
if	O
the	O
user	O
logs	B-General_Concept
out	I-General_Concept
)	O
.	O
</s>
