<s>
CALL/360:BASIC	B-Language
was	O
an	O
IBM	O
dialect	O
of	O
the	O
BASIC	B-Language
programming	I-Language
language	I-Language
for	O
the	O
System/360	B-Application
and	O
later	O
platforms	O
.	O
</s>
<s>
It	O
was	O
based	O
on	O
mid-1960s	O
versions	O
of	O
Dartmouth	B-Language
BASIC	I-Language
but	O
added	O
a	O
number	O
of	O
extensions	O
.	O
</s>
<s>
CALL/360:BASIC	B-Language
was	O
announced	O
in	O
1968	O
,	O
along	O
with	O
several	O
other	O
languages	O
for	O
the	O
system	O
including	O
APL	B-Language
and	O
FORTRAN	B-Application
and	O
the	O
Datatext	O
markup	O
language	O
based	O
text	B-Application
editor	I-Application
.	O
</s>
<s>
Customer	O
demand	O
forced	O
them	O
to	O
offer	O
these	O
products	O
to	O
other	O
System/360	B-Application
users	O
,	O
which	O
they	O
did	O
by	O
releasing	O
it	O
on	O
an	O
"	O
as	O
is	O
"	O
basis	O
with	O
no	O
support	O
.	O
</s>
<s>
Later	O
the	O
same	O
year	O
,	O
IBM	O
transferred	O
this	O
department	O
,	O
along	O
with	O
the	O
rest	O
of	O
its	O
timesharing	B-General_Concept
services	O
,	O
to	O
the	O
Service	O
Bureau	O
Corporation	O
(	O
SBC	O
)	O
,	O
including	O
the	O
CALL/360	O
operating	B-General_Concept
system	I-General_Concept
and	O
CALL/360:BASIC	B-Language
.	O
</s>
<s>
CALL/360:BASIC	B-Language
is	O
almost	O
identical	O
to	O
Dartmouth	B-Language
BASIC	I-Language
the	O
Fourth	O
,	O
including	O
support	O
for	O
the	O
advanced	O
rix	O
math	O
features	O
.	O
</s>
<s>
Like	O
early	O
versions	O
of	O
Dartmouth	O
,	O
CALL/360:BASIC	B-Language
supported	O
one	O
and	O
two	O
dimensional	O
arrays	O
,	O
with	O
the	O
lower	O
index	O
always	O
being	O
1	O
.	O
</s>
<s>
CALL/360:BASIC	B-Language
included	O
most	O
of	O
the	O
matrix	O
commands	O
from	O
Dartmouth	O
,	O
including	O
the	O
ability	O
to	O
perform	O
basic	O
math	O
on	O
a	O
matrix	O
as	O
a	O
single	O
operation	O
,	O
like	O
where	O
A	O
is	O
an	O
array	O
that	O
will	O
then	O
have	O
all	O
of	O
its	O
elements	O
multiplied	O
by	O
10	O
.	O
</s>
<s>
The	O
major	O
addition	O
to	O
CALL/360:BASIC	B-Language
was	O
a	O
usable	O
file	O
handling	O
system	O
.	O
</s>
<s>
with	O
a	O
similar	O
list	O
of	O
one	O
or	O
more	O
file	O
numbers	O
freed	O
the	O
file	B-Application
handles	I-Application
.	O
</s>
<s>
The	O
following	O
program	O
opens	O
the	O
file	O
for	O
input	O
as	O
file	B-Application
handle	I-Application
10	O
,	O
and	O
then	O
reads	O
lines	O
of	O
data	O
containing	O
a	O
product	O
name	O
and	O
four	O
sales	O
prices	O
in	O
a	O
loop	O
.	O
</s>
