<s>
Hermes	B-Operating_System
 '	O
primary	O
features	O
included	O
:	O
</s>
<s>
Language	O
support	O
of	O
processes	O
and	O
interprocess	B-Operating_System
communication	I-Operating_System
.	O
</s>
<s>
Compile-time	B-Application
verification	O
that	O
operations	O
use	O
initialized	O
data	O
.	O
</s>
<s>
In	O
this	O
role	O
of	O
compile-time	B-Application
checking	O
of	O
data	O
initialization	O
is	O
similar	O
to	O
definite	O
assignment	O
analysis	O
performed	O
by	O
Java	B-Language
,	O
Cyclone	B-Language
and	O
C#	B-Application
.	O
</s>
<s>
Hermes	B-Operating_System
and	O
its	O
predecessor	O
,	O
NIL	O
(	O
Network	O
Implementation	O
Language	O
)	O
,	O
were	O
the	O
earliest	O
programming	O
languages	O
supporting	O
this	O
form	O
of	O
initialization	O
checking	O
.	O
</s>
