G09B 7/00 - Electrically-operated teaching apparatus or devices working with questions and answers G09B 5/12 - Electrically-operated educational appliances providing for individual presentation of information to a plurality of student stations different stations being capable of presenting different information simultaneously G06F 7/00 - Methods or arrangements for processing data by operating upon the order or content of the data handled G06F 3/00 - Input arrangements for transferring data to be processed into a form capable of being handled by the computer Output arrangements for transferring data from processing unit to output unit, e.g. G06F 17/00 - Digital computing or data processing equipment or methods, specially adapted for specific functions G06F 16/176 - Support for shared access to files File sharing support G06F 16/11 - File system administration, e.g. G06F 16/00 - Information retrieval Database structures therefor File system structures therefor G09B 5/00 - Electrically-operated educational appliances G06F 17/30 - Information retrieval Database structures therefor
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