Abstract: Taped data copying is disclosed having the capability of high speed simultaneous generation of multiple data copies. Storage media, for example magnetic tape, having data, normally in digital form, recorded thereon is read at a master unit and electrical signals indicative of the data is generated and broadcast over a computer bus to a plurality of addressable memory units where data-indicative information is simultaneously written into the plurality of memory units. Each memory unit is connected with a different associated one of a plurality of magnetic tape-containing data copying units so that data-indicative information stored in each memory unit is read and reliably copied onto the tape at the associated data copying unit. A processing unit is included to control writing information into the memory units, reading information stored in the memory units, and verifying the integrity and content of data copies.

Abstract: A sightless indicating system and method is disclosed that is useful as an indicating device for diverse equipment, including equipment such as an electronic calculator, and is particularly useful by a blind person. When utilized as a part of an electronic calculator, a standard calculator keyboard is modified to include a sign key and an output key so that an operator can initiate output indications and determine the sign of such indications in addition to initiating the customary numerical and function inputs. The customary numerical and function inputs are processed in conventional manner except that the calculator output is converted to a sightless indicating form, such as audible signals indicative of output.