<s>
iStumbler	B-Protocol
is	O
a	O
utility	O
for	O
finding	O
wireless	B-General_Concept
networks	I-General_Concept
and	O
devices	O
with	O
AirPort	O
-	O
or	O
Bluetooth-enabled	O
Macintosh	B-Device
computers	I-Device
.	O
</s>
<s>
iStumbler	B-Protocol
was	O
originally	O
based	O
on	O
MacStumbler	O
source	O
code	O
.	O
</s>
<s>
Its	O
early	O
development	O
focused	O
on	O
detection	O
of	O
open	O
wireless	B-General_Concept
(	O
802.11	O
)	O
networks	O
,	O
but	O
more	O
recent	O
versions	O
support	O
the	O
detection	O
of	O
Bluetooth	B-Protocol
wireless	B-General_Concept
devices	O
and	O
Bonjour	B-Application
network	B-General_Concept
services	I-General_Concept
.	O
</s>
<s>
Up	O
to	O
release	O
99	O
,	O
iStumbler	B-Protocol
was	O
open-source	B-Application
under	O
a	O
BSD	B-Operating_System
license	I-Operating_System
.	O
</s>
