<s>
WATBOL	B-Application
is	O
a	O
teaching	O
compiler	B-Language
for	O
the	O
COBOL	B-Application
programming	I-Application
language	I-Application
developed	O
in	O
1969	O
at	O
the	O
University	O
of	O
Waterloo	O
.	O
</s>
<s>
The	O
compiler	B-Language
was	O
a	O
companion	O
product	O
,	O
built	O
under	O
the	O
design	O
philosophy	O
,	O
of	O
Waterloo	O
’s	O
earlier	O
,	O
widely	O
used	O
WATFOR	B-Language
teaching	O
compiler	B-Language
.	O
</s>
<s>
Since	O
programs	O
written	O
by	O
undergraduate	O
students	O
were	O
unlikely	O
to	O
be	O
run	O
more	O
than	O
a	O
few	O
times	O
,	O
after	O
they	O
were	O
successfully	O
written	O
and	O
debugged	O
,	O
the	O
efficiency	O
of	O
the	O
program	O
,	O
once	O
compiled	B-Language
was	O
of	O
secondary	O
importance	O
,	O
compared	O
with	O
giving	O
simpler	O
,	O
clearer	O
error	O
messages	O
,	O
and	O
in	O
simplifying	O
the	O
steps	O
for	O
the	O
student	O
to	O
compile	B-Language
the	O
program	O
.	O
</s>
<s>
At	O
that	O
time	O
executing	O
a	O
program	O
through	O
the	O
use	O
of	O
commercial	O
compiler	B-Language
was	O
a	O
three-step	O
process	O
.	O
</s>
<s>
First	O
the	O
Fortran	O
,	O
or	O
COBOL	B-Application
,	O
had	O
to	O
be	O
compiled	B-Language
into	O
assembly	B-Language
language	I-Language
,	O
then	O
the	O
assembly	B-Language
language	I-Language
had	O
to	O
be	O
assembled	O
into	O
binary	O
code	O
;	O
finally	O
the	O
compiled	B-Language
and	O
assembled	O
code	O
had	O
to	O
be	O
linked	O
with	O
previously	O
written	O
libraries	O
of	O
subroutines	O
.	O
</s>
<s>
WATFOR	B-Language
and	O
WATBOL	B-Application
allowed	O
simple	O
programs	O
to	O
be	O
compiled	B-Language
,	O
linked	O
,	O
and	O
executed	O
in	O
a	O
single	O
step	O
.	O
</s>
<s>
In	O
1982	O
Carol	O
Vogt	O
wrote	O
that	O
230	O
other	O
institutions	O
were	O
using	O
WATBOL	B-Application
.	O
</s>
