<s>
IDL	O
(	O
Interface	B-General_Concept
Description	I-General_Concept
Language	I-General_Concept
)	O
is	O
a	O
software	O
interface	B-General_Concept
description	I-General_Concept
language	I-General_Concept
(	O
also	O
referred	O
to	O
as	O
Interface	O
Descriptor	O
Language	O
)	O
created	O
by	O
William	O
Wulf	O
and	O
John	O
Nestor	O
of	O
Carnegie	O
Mellon	O
University	O
and	O
David	O
Lamb	O
of	O
Queen	O
's	O
University	O
,	O
Canada	O
.	O
</s>
<s>
Like	O
other	O
interface	B-General_Concept
description	I-General_Concept
languages	I-General_Concept
,	O
IDL	O
defined	O
interfaces	O
in	O
a	O
language	O
-	O
and	O
machine	O
-	O
independent	O
way	O
,	O
allowing	O
the	O
specification	O
of	O
interfaces	O
between	O
components	O
written	O
in	O
different	O
languages	O
,	O
and	O
possibly	O
executing	O
on	O
different	O
machines	O
using	O
remote	B-Operating_System
procedure	I-Operating_System
calls	I-Operating_System
.	O
</s>
<s>
DIANA	B-Language
and	O
its	O
predecessor	O
AIDA	O
,	O
and	O
for	O
marshalling	B-Application
the	O
vanilla	O
IDL	O
External	O
Representation	O
.	O
</s>
<s>
BiiN	O
's	O
DBMS	O
used	O
IDL	O
as	O
well	O
,	O
and	O
for	O
marshalling	B-Application
a	O
more	O
compact	O
binary	O
IDL	O
External	O
Representation	O
.	O
</s>
