This is from the state department website.
http://fas.org/spp/starwars/offdocs/itar/p121.htm
Category XII-Fire Control, Range Finder, Optical and Guidance and Control Equipment
*(a) Fire control systems; gun and missile tracking and guidance systems; gun range, position, height finders, spotting instruments and laying equipment; aiming devices (electronic, optic, and acoustic); bomb sights, bombing computers, military television sighting and viewing units, and periscopes for the articles of this section.
*(b) Lasers specifically designed, modified or configured for military application including those used in military communication devices, target designators and
range finders, target detection systems, and directed energy weapons.
*(c) Infrared focal plane array detectors specifically designed, modified or configured for military use; image intensification and other night sighting equipment or systems specifically designed, modified, or configured for military use; second generation and above military image intensification tubes (defined below) specifically designed, developed, modified, or configured for military use, and, infrared, visible, and ultraviolet devices specifically designed, developed, modified, or configured for military application.