<s>
VIPER	O
is	O
a	O
32-bit	O
microprocessor	B-Architecture
design	O
created	O
by	O
Royal	O
Signals	O
and	O
Radar	O
Establishment	O
(	O
RSRE	O
)	O
in	O
the	O
1980s	O
,	O
intended	O
to	O
be	O
used	O
in	O
safety-critical	B-Application
systems	I-Application
such	O
as	O
avionics	O
.	O
</s>
<s>
It	O
was	O
the	O
first	O
commercial	O
microprocessor	B-Architecture
design	O
to	O
be	O
formally	O
proven	O
correct	O
,	O
although	O
there	O
was	O
some	O
controversy	O
surrounding	O
this	O
claim	O
and	O
the	O
definition	O
of	O
proof	O
.	O
</s>
<s>
A	O
safety	B-Application
critical	I-Application
programming	O
language	O
named	O
Newspeak	O
was	O
designed	O
by	O
Ian	O
Currie	O
of	O
RSRE	O
in	O
1984	O
for	O
use	O
with	O
VIPER	O
.	O
</s>
