<s>
The	O
L1	B-Language
and	I-Language
L2	I-Language
interpreted	B-Application
languages	I-Application
were	O
developed	O
by	O
Bell	O
Labs	O
in	O
the	O
1950s	O
to	O
provide	O
floating-point	B-Algorithm
arithmetic	I-Algorithm
capabilities	O
,	O
simplified	O
memory	O
access	O
,	O
and	O
other	O
enhancements	O
for	O
the	O
IBM	O
model	O
650	B-Device
(	O
IBM	B-Device
650	I-Device
)	O
digital	O
computer	O
and	O
allow	O
users	O
to	O
more	O
easily	O
develop	O
application-specific	O
code	O
for	O
these	O
machines	O
.	O
</s>
<s>
L1	B-Language
was	O
developed	O
by	O
Michael	O
Wolontis	O
and	O
Dolores	O
Leagus	O
and	O
was	O
released	O
in	O
September	O
1955	O
.	O
</s>
<s>
Later	O
,	O
Richard	O
Hamming	O
and	O
Ruth	O
A	O
.	O
Weiss	O
developed	O
the	O
L2	B-Language
package	O
which	O
enhanced	O
L1	B-Language
by	O
providing	O
additional	O
mathematical	O
capabilities	O
tailored	O
to	O
more	O
engineering-oriented	O
applications	O
.	O
</s>
<s>
L1	B-Language
and	I-Language
L2	I-Language
were	O
widely	O
used	O
within	O
Bell	O
Labs	O
,	O
and	O
also	O
by	O
outside	O
users	O
,	O
who	O
usually	O
called	O
them	O
"	O
Bell	O
1	O
and	O
Bell	O
2.	O
"	O
</s>
<s>
According	O
to	O
Bell	O
Labs	O
,	O
"	O
In	O
the	O
late	O
1950s	O
,	O
at	O
least	O
half	O
the	O
IBM	B-Device
650s	I-Device
doing	O
scientific	O
and	O
engineering	O
work	O
used	O
either	O
Bell	O
1	O
or	O
Bell	O
2.	O
"	O
</s>
