Apparatus for collecting encoded data for supply to computers; Apparatus for controlling the input of data; Apparatus for controlling the output of data; Apparatus for controlling the processing of data; Apparatus for controlling the storage of data; Apparatus for data communication between laser copying machines; Apparatus for data communications between computers; Apparatus for data entry; Apparatus for data input; Apparatus for data output; Apparatus for data processing; Apparatus for data storage; Apparatus for data transmitting; Apparatus for digitising geometric data contained in documents; Apparatus for guarding data communication systems against unauthorised access; Apparatus for input of data; Apparatus for interconnecting data processing equipment; Apparatus for processing data; Apparatus for processing data programmes; Apparatus for processing data relating to images; Apparatus for processing digital data; Apparatus for programming data; Apparatus for reading data; Apparatus for reading data on magnetic apparatus; Apparatus for reading data on optical apparatus; Apparatus for reading recorded data; Apparatus for receiving data; Apparatus for recording data in magnetic readable form; Apparatus for remote data transmission; Apparatus for retrieving data; Apparatus for sending data; Apparatus for the acquisition of data; Apparatus for the communication of data; Apparatus for the conversion of data; Apparatus for the graphic display of data; Apparatus for the processing of data; Apparatus for the storage of data; Apparatus for the storage of pictorial data; Apparatus for the storage of textual data; Apparatus for the transmission of data; Apparatus for transmitting data; Apparatus for transmitting data by the telephone network; Apparatus for transmitting data via the telephone; Apparatus for use in data logging; Cards bearing data for use in data processing apparatus; Cards bearing data for use in data storage apparatus; Cards for use with data processing apparatus (encoded/magnetic); Computer apparatus for processing data; Computer apparatus for the control of data; Computer apparatus for the storage of data; Computer apparatus for transmitting data; Computer controlled apparatus for furnishing voice responses to data inputs; Consoles for use with data processing apparatus; Data access apparatus for use in accessing stored information; Data carriers for use with data processing apparatus; Data input apparatus for use with computers; Data processing apparatus for use in information storage; Data processing apparatus for use with computers; Data readers being acoustic devices for data processing apparatus; Data readers being optical devices for data processing apparatus; Data storage apparatus for computers; Data storage apparatus for use with data processing apparatus; Development apparatus for data processing apparatus; Direct broadcasting apparatus for the reception of data; Direct broadcasting apparatus for the transmission of data; Disc drives for electronic data processing apparatus; Display apparatus for use with data processing installations; Electric apparatus for data processing; Electric apparatus for storing computer data; Electrical apparatus for data acquisition; Electrical apparatus for recording data; Electrical apparatus for the input of data; Electrical apparatus for the output of data; Electrical apparatus for use in the calculation of data; Electrical apparatus for use in the encoding of data; Electrical communication apparatus for transmitting data; Electrical data input apparatus for use with computers; Electrical data output apparatus for computers; Electrical print out apparatus for use with electronic data processing apparatus; Electronic apparatus and instruments for data collection; Electronic apparatus for data processing; Electronic apparatus for manipulating data; Electronic apparatus for relaying data; Electronic circuits for data processing apparatus; Electronic apparatus for the transmission of data; Electronic data apparatus for use with computers; Electronic industrial network apparatus for high speed data transmission; Encoded programmes for data processing apparatus; Encoded programs for data processing apparatus; External storage apparatus for use with data processing apparatus; Flat screens for electronic data processing apparatus; Information storage devices for use in data processing apparatus; Ink jet printers for use with data processing apparatus; Input apparatus for transferring data from computers; Input apparatus for data processors; Input apparatus for transferring data to computers; Input apparatus for use with computers for handling data; Input apparatus for use with data transmission apparatus; Input devices for data processing apparatus; Keyboards for use with data communication apparatus; Keyboards for use with data processing apparatus; Local area networking apparatus for the switching of data; Local area networking apparatus for the transmission of data; Non-impact printers for use with data processing apparatus; Optical apparatus for the processing of data; Optical apparatus for the reception of data; Optical apparatus for the recording of data; Optical apparatus for the transmission of data; Optical data storage apparatus for use in labelling; Pneumatic apparatus for recording data; Pneumatic apparatus for tabulating data; Portable electronic apparatus for the analysis of machine data; Portable electronic apparatus for the collection of machine data; Print out apparatus for use data processing apparatus; Printing apparatus for use with data processing apparatus; Printers for data processing apparatus; Printer apparatus for use with data processing apparatus; Printout apparatus for data processing apparatus; Program carriers for electronic data processing apparatus; Program carrying magnetic discs for use with electronic data processing apparatus; Programming instructions for data processing apparatus (recorded); Programs for data processing apparatus (recorded); Programs for data processing apparatus recorded on cards; Programs for data processing apparatus recorded on disks; Programs for data processing apparatus recorded on tapes; Scientific apparatus for the receiving of data; Sensors for real time data input apparatus; Sensors for real time data output apparatus; Solid-state electrical apparatus for storing computer data; Storage apparatus for computer data; Tape drive apparatus for data processors; Telecommunications apparatus for transferring data to computers; Telecommunications apparatus for transmitting data for use with computers; Visual display apparatus for reading data; Visual display apparatus for recording data