Handheld computational device

Details Handheld computational device Handheld computational device

2011-03-01

2011-03-01

Malzahn, David H (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Having specialized input

Reexamination Certificate

active

07899854

ABSTRACT:
In one aspect, the invention provides computational device that comprises a processor for performing mathematical computations, and a user interface. The user interface comprises a display and a plurality of functional buttons each associated one of a plurality of variables in a mathematical equation defining a relationship among those variables. In response to the selection of any of the buttons by a user, the processor effects presentation of one or more prompts in the display to invite the user to enter values for variables associated with buttons other than that selected by the user, and upon entry of the last variable value, the processor calculates a value for the variable selected by the user and presents said calculated value in the display.

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