Handheld liquid nitrogen cryosurgical and cryospray devices for use in treating skin conditions having a built-in video camera, audio recorder and temperature sensor that measures the temperature of the skin as liquid nitrogen is sprayed on the skin

Audio and videoconferencing equipment, namely electronic cameras, microphones and camera pedestals; software for image and sound processing; software for communication of image and sound-based information; software for image and sound-based surveillance, security, identification and recognition of a subject; software for tracking a subject's position within a room; software for voice recognition; software for remote control of the movement of cameras