<s>
The	O
TI-68	B-Device
was	O
a	O
scientific	O
pocket/desktop	O
calculator	B-Application
produced	O
by	O
Texas	O
Instruments	O
.	O
</s>
<s>
A	O
wealth	O
of	O
features	O
made	O
it	O
a	O
versatile	O
calculator	B-Application
.	O
</s>
<s>
Named	O
variables	O
,	O
and	O
interactive	B-General_Concept
formulas	O
of	O
up	O
to	O
79	O
keystrokes	O
,	O
could	O
be	O
stored	O
,	O
subject	O
to	O
a	O
total	O
memory	B-General_Concept
usage	O
of	O
440	O
bytes	B-Application
.	O
</s>
<s>
Some	O
features	O
included	O
a	O
simultaneous	O
equations	O
solver	O
,	O
a	O
polynomial	O
root	O
finder	O
,	O
two-variable	O
statistics	O
,	O
complex	O
numbers	O
,	O
and	O
a	O
recall	O
feature	O
,	O
which	O
would	O
display	B-Device
the	O
last	O
equation	O
entered	O
and	O
its	O
answer	O
.	O
</s>
<s>
It	O
had	O
several	O
features	O
useful	O
to	O
computer	B-Application
programmers	I-Application
,	O
such	O
as	O
radix	O
modes	O
and	O
conversions	O
and	O
bitset	B-Data_Structure
operators	O
.	O
</s>
<s>
It	O
had	O
an	O
alphanumeric	B-Device
keyboard	I-Device
and	O
display	B-Device
.	O
</s>
<s>
It	O
was	O
also	O
offered	O
by	O
Radio	O
Shack	O
as	O
model	O
EC-4044	B-Device
,	O
but	O
in	O
a	O
different	O
color	O
scheme	O
.	O
</s>
