189161 ⎘
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. interface arrangements; Input arrangements or combined input and output arrangements for interaction between user and computer; Input arrangements using manually operated switches, e.g. using keyboards or dials; Arrangements for converting discrete items of information into a coded form, e.g. arrangements for interpreting keyboard generated codes as alphanumeric codes, operand codes or instruction codes Manual direct entries, e.g. key to main memory