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Accommodation (see Tourism)
Accounting services
Adaptive technologies (see Assistive devices)
Advanced materials
Advertising services
Aerospace
Agriculture
Aids, technical (supplies, equipment, technology) (see Assistive devices)
Aids to daily living (see Assistive devices)
Aids to independent living (see Assistive devices)
Alloys, metal (see Advanced materials)
Amateur radio service

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Antenna structures
Apparel
Appliances, major household
Aquaculture (see Fisheries)
Architectural services
Assistive devices
Atomic energy (see Energy)
Auctions, spectrum
Automotive
Aviation