<s>
The	B-Device
Little	I-Device
Professor	I-Device
is	O
a	O
backwards-functioning	O
calculator	B-Application
designed	O
for	O
children	O
ages	O
5	O
to	O
9	O
.	O
</s>
<s>
When	O
the	O
user	O
turns	O
the	B-Device
Little	I-Device
Professor	I-Device
on	O
and	O
selects	O
a	O
difficulty	O
level	O
,	O
an	O
incomplete	O
equation	O
such	O
as	O
"	O
3	O
x	O
6	O
=	O
"	O
appears	O
on	O
the	O
LED	O
screen	O
.	O
</s>
<s>
If	O
the	O
answer	O
supplied	O
is	O
correct	O
,	O
the	B-Device
Little	I-Device
Professor	I-Device
goes	O
to	O
the	O
next	O
equation	O
.	O
</s>
<s>
The	B-Device
Little	I-Device
Professor	I-Device
displays	O
the	O
number	O
of	O
correct	O
first	O
answers	O
after	O
each	O
set	O
of	O
10	O
problems	O
.	O
</s>
<s>
The	B-Device
Little	I-Device
Professor	I-Device
was	O
first	O
released	O
by	O
Texas	O
Instruments	O
on	O
June	O
13	O
,	O
1976	O
.	O
</s>
<s>
As	O
the	O
first	O
electronic	O
educational	O
toy	O
,	O
the	B-Device
Little	I-Device
Professor	I-Device
is	O
a	O
common	O
item	O
on	O
calculator	B-Application
collectors	O
 '	O
lists	O
.	O
</s>
<s>
In	O
1976	O
,	O
the	B-Device
Little	I-Device
Professor	I-Device
cost	O
less	O
than	O
$20	O
.	O
</s>
<s>
The	O
second	O
generation	O
Little	B-Device
Professor	I-Device
was	O
designed	O
by	O
Mark	O
Bailey	O
whilst	O
working	O
for	O
Raffo	O
and	O
Pape	O
.	O
</s>
<s>
In	O
a	O
brief	O
interview	O
in	O
2013	O
Bailey	O
stated	O
'	O
I	O
've	O
designed	O
everything	O
from	O
private	O
jets	O
to	O
pregnancy	O
tests	O
but	O
Little	B-Device
Professor	I-Device
remains	O
the	O
highlight	O
of	O
my	O
career.	O
'	O
</s>
<s>
A	O
solar	O
version	O
of	O
Little	B-Device
Professor	I-Device
was	O
introduced	O
during	O
the	O
2000s	O
.	O
</s>
<s>
An	O
emulator	B-Application
of	O
the	B-Device
Little	I-Device
Professor	I-Device
for	O
Android	O
was	O
published	O
in	O
2012	O
.	O
</s>
<s>
In	O
2015	O
,	O
the	O
MESS	O
emulator	B-Application
also	O
included	O
the	O
original	O
Little	B-Device
Professor	I-Device
as	O
a	O
sort	O
of	O
pack-in	O
.	O
</s>
