Computer software, including computer software for facilitating audio and/or video and/or data communication between computers, telephones, television sets, video cameras and the like; computer software for facilitating video conferencing via computers or telephones; computer hardware; cameras and video cameras; apparatus for recording, transmission or reproduction of sound or images including video, audio and data transmitters, receivers and transceivers; home and building security equipment including surveillance cameras, alarm systems; fire protection equipment including fire alarm systems; scientific, photographic and signalling apparatus and instruments; magnetic data carriers, recording disks