Target location apparatus (electronic); Target trackers (electronic); Target surveillance apparatus (electronic); Electronic article surveillance systems; Electronic surveillance apparatus; Electronic surveillance apparatus for articles; Surveillance apparatus (electronic); Detection apparatus employing electromagnetic waves (other than for medical use); Computer software; Application software; Computer programs for the evaluation of thermal radiation levels; Target location apparatus (optical); Target trackers (optical); Target surveillance apparatus (optical); Electro-optical apparatus; Electro-optical devices; Electro-optical control devices; Electro-optical sensors; Infrared optical apparatus; Optical apparatus for the reception of data; Optical apparatus for the recording of data; Video surveillance apparatus