Other functions solve complex mathematical equations, plot scientific figures or chart natural events.

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This also violates economy of mechanism since mixing these two functions is clearly more complex.

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Casio has redesigned the ClassPad series' software keyboard to make this new model easier to use, organizing functions to correspond to three levels of learning difficulty, beginning with basic functions used by everyone like fractions, square roots, and trigonometric functions, then advanced functions like differential calculus, complex compound numbers, and sigma calculations, and finally even more advanced calculations including piecewise and user-defined formulas.

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There are also complex side conditions, which restrict the domains of these functions.

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Hawkins, who will continue to work as chief technical officer of Treo maker palmOne (nasdaq: PLMO - news - people ), already has his own research lab to study the neocortex, a massive part of the brain thought to hold such higher level functions as language, learning, memory and complex thought.

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The functions range from simple transformations to those for more complex techniques like regular expressions and machine-learning algorithms.

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We also appreciated that most functions remain governed by standard switches, buttons and dials instead of an annoyingly complex menu-driven multimedia system of the sort that tends to hamper most upscale cars these days.

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In conjunction with the Complex Management Team, Renn was supposed to ensure proper execution of all operational, administrative and compliance functions.

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