<s>
CUPL	O
was	O
based	O
on	O
an	O
earlier	O
Cornell-developed	O
programming	O
language	O
,	O
CORC	B-Language
.	O
</s>
<s>
CUPL	O
had	O
a	O
very	O
simple	O
syntax	O
similar	O
to	O
BASIC	O
and	O
to	O
PL/I	B-Language
.	O
</s>
<s>
At	O
the	O
time	O
,	O
Cornell	O
's	O
computer	O
was	O
an	O
IBM	B-Device
System/360	I-Device
Model	I-Device
40	I-Device
batch	O
processing	O
system	O
with	O
only	O
64KB	O
of	O
core	B-General_Concept
memory	I-General_Concept
.	O
</s>
<s>
CUPL	O
was	O
able	O
to	O
process	O
a	O
large	O
number	O
of	O
student	O
programs	O
quickly	O
by	O
remaining	O
resident	O
in	O
core	B-General_Concept
memory	I-General_Concept
,	O
but	O
the	O
compiler	O
occupied	O
58KB	O
of	O
memory	O
,	O
leaving	O
only	O
a	O
small	O
amount	O
for	O
the	O
program	O
code	O
and	O
variable	O
storage	O
.	O
</s>
<s>
The	O
CUPL	O
compiler	O
was	O
reworked	O
to	O
implement	O
a	O
subset	O
of	O
the	O
PL/I	B-Language
programming	I-Language
language	I-Language
,	O
called	O
PL/C	B-Language
.	O
</s>
<s>
PL/C	B-Language
retained	O
the	O
diagnostic	O
and	O
error	O
correction	O
features	O
of	O
CUPL	O
.	O
</s>
<s>
There	O
is	O
an	O
implementation	O
of	O
CUPL	O
and	O
CORC	B-Language
in	O
modern	O
C	O
for	O
Unix-like	O
systems	O
that	O
includes	O
both	O
transcriptions	O
of	O
the	O
original	O
manuals	O
and	O
a	O
chrestomathy	O
of	O
programs	O
in	O
these	O
languages	O
.	O
</s>
