<s>
The	O
Professional	B-Application
File	I-Application
System	I-Application
is	O
a	O
filesystem	B-Application
originally	O
developed	O
commercially	O
for	O
the	O
Amiga	B-Device
,	O
now	O
distributed	O
on	O
Aminet	B-Device
with	O
a	O
4-clause	O
BSD	B-Operating_System
license	I-Operating_System
.	O
</s>
<s>
It	O
is	O
a	O
compatible	O
successor	O
of	O
AmiFileSafe	O
(	O
AFS	O
)	O
,	O
with	O
an	O
emphasis	O
on	O
added	O
reliability	O
and	O
speed	O
compared	O
to	O
standard	O
Amiga	B-Device
filesystems	B-Application
.	O
</s>
<s>
It	O
also	O
features	O
multi-user	B-Operating_System
abilities	O
like	O
the	O
older	O
MuFS	O
.	O
</s>
<s>
The	O
filesystem	B-Application
is	O
reasonably	O
good	O
at	O
keeping	O
files	O
unfragmented	O
,	O
although	O
there	O
is	O
a	O
defragmentation	O
tool	O
available	O
which	O
will	O
work	O
on	O
an	O
online	O
filesystem	B-Application
.	O
</s>
<s>
It	O
was	O
the	O
first	O
filesystem	B-Application
to	O
introduce	O
the	O
concept	O
of	O
the	O
Recycle	B-Application
Bin	I-Application
natively	O
at	O
filesystem-level	O
to	O
the	O
Amiga	B-Device
,	O
holding	O
the	O
last	O
few	O
deleted	O
files	O
in	O
a	O
hidden	O
directory	O
on	O
the	O
disk	O
root	O
.	O
</s>
