<s>
Euclid	B-Language
is	O
an	O
imperative	B-Application
programming	I-Application
language	I-Application
for	O
writing	O
verifiable	O
programs	O
.	O
</s>
<s>
The	O
implementation	O
was	O
led	O
by	O
Ric	O
Holt	O
at	O
the	O
University	O
of	O
Toronto	O
and	O
James	O
Cordy	O
was	O
the	O
principal	O
programmer	O
for	O
the	O
first	O
implementation	O
of	O
the	O
compiler	B-Language
.	O
</s>
<s>
It	O
was	O
originally	O
designed	O
for	O
the	O
Motorola	B-Device
6809	I-Device
microprocessor	O
.	O
</s>
<s>
It	O
was	O
considered	O
innovative	O
for	O
the	O
time	O
;	O
the	O
compiler	B-Language
development	O
team	O
had	O
a	O
$2	O
million	O
budget	O
over	O
2	O
years	O
and	O
was	O
commissioned	O
by	O
the	O
Defense	O
Advanced	O
Research	O
Projects	O
Agency	O
of	O
the	O
U.S.	O
Department	O
of	O
Defense	O
and	O
the	O
Canadian	O
Department	O
of	O
National	O
Defence	O
.	O
</s>
<s>
Euclid	B-Language
is	O
descended	O
from	O
the	O
Pascal	B-Application
programming	I-Application
language	I-Application
.	O
</s>
<s>
Functions	O
in	O
Euclid	B-Language
are	O
closed	O
scopes	O
,	O
may	O
not	O
have	O
side	O
effects	O
,	O
and	O
must	O
explicitly	O
declare	O
imports	O
.	O
</s>
<s>
Euclid	B-Language
also	O
disallows	O
gotos	O
,	O
floating	O
point	O
numbers	O
,	O
global	O
assignments	O
,	O
nested	O
functions	O
and	O
aliases	O
,	O
and	O
none	O
of	O
the	O
actual	O
parameters	O
to	O
a	O
function	O
can	O
refer	O
to	O
the	O
same	O
thing	O
.	O
</s>
<s>
Euclid	B-Language
implements	O
modules	O
as	O
types	O
.	O
</s>
<s>
Descendants	O
of	O
Euclid	B-Language
include	O
the	O
Mesa	B-Language
programming	I-Language
language	I-Language
,	O
the	O
Concurrent	B-Language
Euclid	I-Language
programming	I-Language
language	I-Language
and	O
the	O
Turing	B-Language
programming	I-Language
language	I-Language
.	O
</s>
