| http://www.w3.org/ns/prov#value | - Referring to FIG. 16, description will now be made of the electric circuit used in the electronic calculator in relation to the drive and back-up batteries 7A to 7C. The central processing unit (CPU) is operable according to a program stored in a built-in read-only memory (ROM) to execute various processes including search, display, calculation and so on.
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