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A video protocolling and retrieval system for the analysis of behaviour. Rec~nt developments in the data processing and video technologies have enabled the desIgn of automatic systems for the handling of video software. The system for the protocoIling and retrieval of audiovisual data (PRA VDA) described here has been developed for applications in behavioural observation and analysis. The facilities available, including time coding, search routines and automatic editing are explained and the advantages of computer aided operation are dealt with. Current applications of the system are briefly discussed.