Casio fx-115ES Plus

[Steve Simpkin]

It is rather amazing what you get for $20. Sharp also has a model with similar capabilities, the EL-W516.

There is a good comparison between the SHARP EL-W516 and the CASIO fx-115ES calculators at:
http://members.bex.net/jtcullen515/Math8.htm

More than a simple comparison, the two volumes presented here (175 pages) are also a good tutorial on how to use these models. The information is usable for newer Casio and Sharp scientific calculator models as well.