Computer hardware and computer software including computer hardware and computer software for use in security and surveillance, event analysis, data storage and data reduction; surveillance apparatus and systems; security warning apparatus and systems; apparatus for recording, transmission or reproduction of sound or images; television apparatus including cameras and monitors; video apparatus including cameras, monitors and recording equipment; digital apparatus including apparatus for the exchange and transmission of digital signals; optical apparatus and instruments including optical apparatus and instruments, for the processing, reception, recording, storage and the transmission of data; optical sensors; checking apparatus and instruments including equipment for use in connection with the provision of data for security