Telescopes; Downloadable computer programs for using the internet and the worldwide web; Electric and electronic video surveillance installations; Infrared detectors; Infrared sensors; Integrated circuits for use in the manufacture of infrared detectors; Night vision goggles; Passive infrared detectors; Remote sensors for use in measuring thermal and infrared radiation energy waves; Surveying instruments; Temperature sensors; Thermal imaging cameras; Thermal imaging systems, not for medical use