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I remember the Innovative Technology fight to keep their version as the principle force in handheld computing, fortunately for the free market world, dispersion took place and TI, Hewlett Packard and Casio among others started making scientic and graphing calculators. Although they do not have the learn key. These calcs have snow-balled into an incredible force in hand-held personal computing, although the abstract math features of any program such as OO.o. math provide a more power powerful term base for abstract math, the features of the modern scientific calculator are a powerful computing resource in the hands of any serious student, teacher, scientist, math professional, or professional who needs help with difficult problems. Many of the newer high-end Hewlett Packards are very fine instruments. Hats off to HP for keeping to a high standard.

I would point out that comparing the HP35s to top of the line Texas Instruments calculators is like comparing apples and oranges. The 35s is a scientific calculator, not a graphing calculator as are the high end TI's of which the article speaks. A much more valid comparison in this instance would be the top of the line HP graphing calculator (the HP50g) at $159.00.