Abstract: Deletion of a particular message in a file unit is accomplished for those messages with deletion set code in a file directory displayed on a screen. Operation of the deletion of a message includes (a) depression of a "deletion" key for indicating a file directory on a screen, (b) designating messages to be deleted by depression of a deletion set/reset key to change a deletion set/reset code to a set code, and (c) execution of deletion by the depression of a "deletion execution" key to delete a message with said deletion set code. A file directory indicated on a screen includes a deletion set/reset code, a message number, nature of a message, length of a message, and first 60 characters of a message, which simplifies identification of a message to be deleted.

Abstract: Within a High Performance Storage Unit (HPSU) digital memory resource, plural ones (up to 4) of a multiplicity (nominally 8) of independently operative storage memory banks, each consisting of four storage modules, are each simultaneously communicating voluminous read data (nominally 144 data bits plus 16 parity bits) read from each to a respective one of plural (nominally 4) output ports of the memory resource, said communicating being upon and via a selected one of a like plural number (4) of wired-OR communication buses.

Abstract: A word processing apparatus comprising a word processor which prepares and edits a document by a first CPU in response to a signal received from an input unit; and a spelling collator capable of collating the spelling of each word from an input unit with a stored correct spelling of such word, by a second CPU independently of the first CPU.

Abstract: A character generator system for dot matrix printers wherein a microprocessor receives an input signal in the form of an M bit digital code, such as ASCII code, and representing a text to be reproduced in dot matrix form as well as other bits of information. The microprocessor converts the incoming code from an M bit code to an N bit code, where N is greater than M, whereby substantially more information may be transmitted. The microprocessor then sends appropriate information to various components of the system that cooperate to control a dot matrix printer in accordance with the input coded information.