This seems to be a clone(?) of Patrick Davidson's [1] Phoenix for TI calculators [2,3].<p>[1]: <a href="http://www.ocf.berkeley.edu/~pad/main.html" rel="nofollow">http://www.ocf.berkeley.edu/~pad/main.html</a><p>[2]: <a href="http://www.ticalc.org/archives/files/fileinfo/148/14876.html" rel="nofollow">http://www.ticalc.org/archives/files/fileinfo/148/14876.html</a><p>[3]: <a href="http://www.ocf.berkeley.edu/~pad/frames-ti83p.html" rel="nofollow">http://www.ocf.berkeley.edu/~pad/frames-ti83p.html</a>