Abstract: An electronic data storage device and calculator apparatus having a memory for storing numerical data including numerical information and non-decimal point symbols for separating predetermined groups of digits of a numerical value into an easily read form. The data stored also includes character information and is displayed on four lines of an LCD display. Upon selecting one of the displayed data, a reverse video display of the selected data occurs whereupon the remaining displayed data is cleared from the display so that it can be used for calculating purposes using the selected data remaining on the display.

Abstract: In an electronic translator apparatus, synonymous phrases (title data) and sentences in plural languages are stored in correspondence to each other. These phrases or sentences are read out and translated. This electronic translator apparatus stores the title data as a basic phrase and the explanatory data relating to the title data, thereby allowing a wide range of translation. The title data can be translated into plural languages which are displayed simultaneously. The title data and corresponding sentences are separately stored, thereby increasing the number of sentences that can be translated. The display method is varied depending on the necessity. If the sentence to be translated is long, part of the original sentence during displaying is ommitted and the translated sentence is displayed in whole. When translating into English, an article may be added or a plural form may be expressed so as to translate properly.

Abstract: An electronic calculator carries out input of data, such as numeric values, stores data therein, and performs operations and processing of the input data according to the operation of necessary function keys. Further, inputted matrix data is stored in relation to one code so that when operating the matrix data, the code is utilized for inputting an operational expression, whereby the procedure for inputting such data for operation can be considerably simplified. If it is desired to preserve input data, the data can be protected by preventing rewriting or redefinition thereof. Also, data processing is enabled which excludes any data abnormally different from other data, thereby enhancing the reliability of the results of the data processing.