<s>
Hydra	B-Application
(	O
stylized	O
as	O
HYDRA	B-Application
)	O
is	O
an	O
early	O
,	O
discontinued	O
,	O
capability-based	O
,	O
object-oriented	B-Language
microkernel	B-Operating_System
designed	O
to	O
support	O
a	O
wide	O
range	O
of	O
possible	O
operating	B-General_Concept
systems	I-General_Concept
to	O
run	O
on	O
it	O
.	O
</s>
<s>
Hydra	B-Application
was	O
created	O
as	O
part	O
of	O
the	O
C.mmp	B-Operating_System
project	O
at	O
Carnegie-Mellon	O
University	O
in	O
1971	O
.	O
</s>
<s>
The	O
name	O
is	O
based	O
on	O
the	O
ancient	O
Greek	O
mythological	O
creature	O
the	O
hydra	B-Application
.	O
</s>
<s>
Hydra	B-Application
was	O
designed	O
to	O
be	O
modular	O
and	O
secure	O
,	O
and	O
intended	O
to	O
be	O
flexible	O
enough	O
for	O
easy	O
experimentation	O
.	O
</s>
<s>
The	O
system	O
was	O
implemented	O
in	O
the	O
programming	O
language	O
BLISS	B-Language
.	O
</s>
