<s>
The	O
Modula	B-Language
programming	I-Language
language	I-Language
is	O
a	O
descendant	O
of	O
the	O
Pascal	B-Application
language	I-Application
.	O
</s>
<s>
It	O
was	O
developed	O
in	O
Switzerland	B-Protocol
,	O
at	O
ETH	O
Zurich	O
,	O
in	O
the	O
mid-1970s	O
by	O
Niklaus	O
Wirth	O
,	O
the	O
same	O
person	O
who	O
designed	O
Pascal	B-Application
.	O
</s>
<s>
The	O
main	O
innovation	O
of	O
Modula	B-Language
over	O
Pascal	B-Application
is	O
a	O
module	B-Architecture
system	I-Architecture
,	O
used	O
for	O
grouping	O
sets	O
of	O
related	O
declarations	O
into	O
program	O
units	O
;	O
hence	O
the	O
name	O
Modula	B-Language
.	O
</s>
<s>
The	O
language	O
is	O
defined	O
in	O
a	O
report	O
by	O
Wirth	O
called	O
Modula	B-Language
.	O
</s>
<s>
A	O
language	O
for	O
modular	B-Architecture
multiprogramming	O
published	O
1976	O
.	O
</s>
<s>
Modula	B-Language
was	O
first	O
implemented	O
by	O
Wirth	O
on	O
a	O
PDP-11	B-Device
.	O
</s>
<s>
Very	O
soon	O
,	O
other	O
implementations	O
followed	O
,	O
most	O
importantly	O
,	O
the	O
compilers	B-Language
developed	O
for	O
University	O
of	O
York	O
Modula	B-Language
,	O
and	O
one	O
at	O
Philips	O
Laboratories	O
named	O
PL	O
Modula	B-Language
,	O
which	O
generated	O
code	O
for	O
the	O
LSI-11	O
microprocessor	B-Architecture
.	O
</s>
<s>
The	O
development	O
of	O
Modula	B-Language
was	O
discontinued	O
soon	O
after	O
its	O
publication	O
.	O
</s>
<s>
Wirth	O
then	O
concentrated	O
his	O
efforts	O
on	O
Modula	B-Language
's	O
successor	O
,	O
Modula-2	B-Language
.	O
</s>
