Abstract: A calculation apparatus in which a controlling unit performs a first storing process for storing a first value in a storing unit; a first displaying process for executing operation on a second value, using the first value to obtain and display a first and second output value on a displaying unit; a second displaying process for executing operation on a third value, using the first value to obtain and display a third and fourth output value on the displaying unit; a second storing process for adding the third output value to the first output value and the fourth output value to the second output value to obtain and store a first sum and a second sum in the storing unit; and a sum displaying process for displaying the first and second sum stored in the storing unit on the displaying unit in response to operation of the key unit.

Abstract: A calculation device comprises a display including both a first display area and a second display area, and a processor being configured to accept operations of at least one of a tax calculation key which are associated with a plurality of tax rates, respectively, to display, when the operation of the tax calculation key associated with any one of the plurality of tax rates was accepted with respect to numerical value data which indicates tax-excluded amount data displayed on the first display area, tax-included amount data on the first display area, the tax-included amount data being calculated based on the tax rate corresponding to the tax calculation key; and to display, on the second display area, tax-included total amount data which indicates a total of the tax-included amount data corresponding to at least one of the numerical value data.

Abstract: An electronic device includes a display, a memory and a processor being configured to: register a plurality of pieces of first computational data in input order; register at least one or more pieces of second computational data each time the second computational data is input, the at least one or more pieces of second computational data corresponding to the plurality of pieces of first computational data, and each piece of the second computational data including numerical value data and calculation data; when second computational data is registered, determine whether the registered second computational data is consistent with the first computational data in input order corresponding to the registered second computational data; when the registered second computational data is determined to be inconsistent with the first computational data, correct the first computational data; and resume the registration of the second computational data after the first computational data is corrected.

Abstract: A calculation apparatus in which a controlling unit performs a first storing process for storing a first value in a storing unit; a first displaying process for executing operation on a second value, using the first value to obtain and display a first and second output value on a displaying unit; a second displaying process for executing operation on a third value, using the first value to obtain and display a third and fourth output value on the displaying unit; a second storing process for adding the third output value to the first output value and the fourth output value to the second output value to obtain and store a first sum and a second sum in the storing unit; and a sum displaying process for displaying the first and second sum stored in the storing unit on the displaying unit in response to operation of the key unit.

Abstract: A calculation device comprises a display including both a first display area and a second display area, and a processor being configured to accept operations of at least one of a tax calculation key which are associated with a plurality of tax rates, respectively, to display, when the operation of the tax calculation key associated with any one of the plurality of tax rates was accepted with respect to numerical value data which indicates tax-excluded amount data displayed on the first display area, tax-included amount data on the first display area, the tax-included amount data being calculated based on the tax rate corresponding to the tax calculation key; and to display, on the second display area, tax-included total amount data which indicates a total of the tax-included amount data corresponding to at least one of the numerical value data.

Abstract: An electronic device includes a display, a memory and a processor being configured to: register a plurality of pieces of first computational data in input order; register at least one or more pieces of second computational data each time the second computational data is input, the at least one or more pieces of second computational data corresponding to the plurality of pieces of first computational data, and each piece of the second computational data including numerical value data and calculation data; when second computational data is registered, determine whether the registered second computational data is consistent with the first computational data in input order corresponding to the registered second computational data; when the registered second computational data is determined to be inconsistent with the first computational data, correct the first computational data; and resume the registration of the second computational data after the first computational data is corrected.

Abstract: An electronic calculator includes first and second display sections, a conversion rate storage unit configured to store a plurality of conversion rates, a conversion rate display unit configured to call the plurality of conversion rates in sequence from the conversion rate storage unit and display the conversion rates on the second display section, a numerical value display unit configured to display a numerical value on the first display section according to a user operation, and a numerical value conversion unit configured to convert the numerical value displayed on the first display section by the numerical value display unit so as to correspond to a conversion transition designated by a user operation, based on a conversion rate displayed on the second display section by the conversion rate display unit.

Abstract: An electronic calculator includes first and second display sections, a conversion rate storage unit configured to store a plurality of conversion rates, a conversion rate display unit configured to call the plurality of conversion rates in sequence from the conversion rate storage unit and display the conversion rates on the second display section, a numerical value display unit configured to display a numerical value on the first display section according to a user operation, and a numerical value conversion unit configured to convert the numerical value displayed on the first display section by the numerical value display unit so as to correspond to a conversion transition designated by a user operation, based on a conversion rate displayed on the second display section by the conversion rate display unit.

Abstract: A solar cell having high heat resistance, reliability and weather resistance that prevents extraneous matter (rain water, dust and the like) from entering, a concentrating solar power generation module and a solar cell manufacturing method are provided. A solar cell 21 includes an optical member 40 that allows concentrated sunlight Ls to pass therethrough, a solar cell element 23 that converts the sunlight Ls that has passed through the optical member 40 into electricity, and a receiver substrate 22 on which the solar cell element 23 is placed.

Abstract: A graph displaying device and method whereby when functional expression data for producing graphs and the conditions of displaying the graphs are set, graphs for functional expressions data input in accordance with the conditions are displayed in corresponding colors on a display. First, functional expression data and corresponding color data which designate display colors of the graphs are input in corresponding relationship. In addition, range data which display coordinates and color data designating display colors of coordinates involved in the range data are input together. In response to this operation, the graphs for the input functional expression data are produced with the range data to which the color data are designated, the last-mentioned color data corresponding to color data which correspond to the functional expression data. The produced graphs and the coordinates are displayed in the corresponding designated colors.

Abstract: An electronic calculating apparatus for use with an overhead projector and a projection screen includes an electronic calculator and a display device. The electronic calculator comprises a data input unit and a data sending unit. The electronic calculator performs an operation corresponding to data inputted from the data input unit, and displays a result of the performed operation. The display device comprises a liquid crystal display unit of a transparent type and a data receiving unit for receiving data sent from the sending unit of the electronic calculator. The display device is placed on the top of the overhead projector, and, upon receipt of the data sent from the data sending unit of the electronic calculator, the display device performs an operation that is substantially the same as the operation performed by the electronic calculator, and displays the result of the performed operation on the liquid crystal display unit of a transparent type.

Abstract: A graph display device which includes an expression input section for inputting functional expression data, an expression color setting for setting a display color for the functional expression data input by the expression input section, and an expression display section for displaying the input functional expression data in the display color set by the expression color setting section. A graph producing section produces a graph for the functional expression data input by the expression input section based on the input functional expression data, and a graph display section display the graph produced by the graph producing section in the same display color as that set for the functional expression data.

Abstract: A cartridge provided with a case for housing an optical disk so that it can be driven and rotated. A recessed section is formed around the peripheral edge of the center hole of the optical disk. A hub, which is used for clamping the optical disk by the use of a magnetic force, is formed into a hat-shape, and it is placed at the recessed section. The height of the hub is set to be greater than the gap between the optical disk and the cartridge case. Without the necessity of fixing the hub to the disk, this arrangement makes it possible to prevent the hub from coming off from the recessed section. Thus, the arrangement eliminates the fixing process between the hub and the optical disk as well as maintaining the clamping function of the hub, thereby making it possible to reduce the manufacturing cost.

Abstract: A graph display apparatus wherein a dynamic invention has the following arrangement. A dynamic graph key in a key input unit is operated by a user and a functional formula subjected to graph calculation and a change range and a change pitch of a coefficient value present in the functional formula input using numeric. symbol keys are stored in a formula register in a RAM (Random Access Memory). When an execution key is operated in a state wherein a coefficient change speed is stored in a register, the coefficient value of the functional formula is sequentially replaced within the change range at the change pitch.

Abstract: A graph display apparatus includes a plurality of functional formulas to be displayed as graphs and their coordinate ranges are stored in a memory by operating numeric .multidot. symbol keys on a key input unit. The plurality of stored formulas are displayed on a display unit by operating a "list" key. When a plurality of arbitrary formulas are designated and a "synthesis" key is operated, the graphs of the designated formulas are calculated and displayed on a single coordinate system in accordance with coordinate ranges of the formula which is designated first. When the plurality of arbitrary formulas are designated and a "division" key is operated, the functional formulas are displayed on different coordinate systems in accordance with corresponding coordinate ranges. When the graphs of a plurality of input formulas are calculated and displayed, the individual graphs can be appropriately synthesized or divided and can be displayed in comparison with each other.