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{{main|Pocket computer}}
In BASIC notation the formular is entered as it would be entered in BASIC <CODE>PRINT</CODE> command - the <CODE>PRINT</CODE> command itself beein optional. On pressing the ENTER the result would be displayed. Typing mistakes in the entered formular could be corrected using the same editor function as available when programming the calculator.
Some BASIC programmable [[Pocket computer|Pocket computers]] had dedicated trigonometric keys <ref>The picture of the [http://pocket.free.fr/html/casio/fx-880p_e.html FX-880P] show sin, cos and tan keys on the second row right hand side.</ref> hance the keystroke count is given as a range.
Some BASIC programmable [[Pocket computer|Pocket computers]] could also be operated in arithmetic logic.
== '''Direct algebraic logic (D.A.L.)''' ==
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