<s>
The	O
Jasik	B-Operating_System
Debugger	I-Operating_System
(	O
or	O
more	O
correctly	O
,	O
The	O
Debugger	B-Application
from	O
Jasik	O
Designs	O
)	O
,	O
was	O
a	O
debugger	B-Application
tool	O
for	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
.	O
</s>
<s>
Pitched	O
as	O
a	O
much	O
more	O
powerful	O
alternative	O
to	O
Macsbug	B-Operating_System
,	O
it	O
was	O
a	O
popular	O
choice	O
among	O
professional	O
Mac	O
developers	O
until	O
the	O
advent	O
of	O
more	O
advanced	O
source-level	B-Application
debuggers	I-Application
such	O
as	O
that	O
built	O
into	O
Metrowerks	B-Operating_System
Codewarrior	I-Operating_System
.	O
</s>
<s>
While	O
Jasik	O
's	O
debugger	B-Application
featured	O
a	O
graphical	B-Application
user	I-Application
interface	I-Application
,	O
it	O
was	O
laid	O
out	O
in	O
a	O
very	O
arbitrary	O
and	O
peculiar	O
way	O
,	O
with	O
buttons	O
seemingly	O
randomly	O
sized	O
and	O
positioned	O
.	O
</s>
