Abstract: A data processing system having a relational data memory device for storing data relational to the data to be input through an input device, and a retrieval device for the relational data.The system further has a detecting device for detecting a quantity of the retrieved relational data, and relational data display control device for visually representing the retrieved relational data on the display device while fluctuating the relational data display area on the display device in accordance with the quantity of the retrieved relational data detected by the detecting device.With the thus constituted system, when visually representing the retrieved relational data on the display device, the display utilization efficiency as well as the operational facility is enhanced as the display area for the relational data is fluctuated in accordance with the quantity thereof.

Abstract: An electronic typewriter or a word processor with a spelling check function for speedier typing comprises a keyboard, a dictionary memory, a spelling checker, alarm means for issuing an alarm when the input word is determined to be incorrectly spelled, proper noun determination means for determining whether the input word is a proper noun and skip means for not activating the alarm means when the input word is determined to be a proper noun. The input word is determined to be a proper noun when the first letter is an upper case letter and the input word is not a first word in a sentence, or when the input word is composed of upper case letters and the preceding words are not composed of upper case letters.

Abstract: A character erasable printing apparatus is designed to erase a character or an underline in plural times of erasing action by moving the printing head, and to print a character by a single printing action.Therefore, when an underlined character is erased together with its underline, and a correct character is printed together with an underline, the underline is interrupted.Disclosed are, to pervent such interruption of the underline, a character erasable printing apparatus capable of erasing only the character without erasing the underline when the underline mode is being set, a character erasable printing apparatus capable of erasing only the character without erasing the underline when erasing a character adjacent to an underlined character, and a character erasable printing apparatus capable of erasing the underline without moving the printing head when erasing an underline of a character adjacent to an underlined character.