Category A
- Abalone Fishing
- Abattoir
- Abrasive Blasting
- Abrasives Manufacturing
- Academic Tutoring Service
- Accident and Household Insurance
- Accommodation
- Accountant
- Accounting and Auditing Service
- Acetylene Gas Manufacturing
- Acoutsic and Plaster Tiles Manufacturing
- Actor
- Actuarial Service
- Acupuncture Service
- Adhesives Manufacturing
- Adhesives Wholesaling
- Adoption Service
- Adult Day Care Centre Operation
- Adult Education
- Adult Novelties And Products
- Adult Services
- Advertising Agency And Services
- Aerial Agricultural Services
- Aerial Crop Dusting Or Spraying
- Aerial Mustering
- Aerial Pest Control
- Aerial Photography
- Aerodrome Runway Construction
- Aerospace Engineering
- Aerospace Medicine
- Aged Care Accommodation And Services
- Aggregate Quarrying
- Agistment Service
- Agricultural Equipment Wholesaling
- Agricultural Machinery
- Agricultural Machinery Leasing
- Agricultural Machinery or Equipment Manufacturing
- Agricultural Machinery Repair And Services
- Agricultural Produce or Supplies Wholesaling
- Agricultural Research Activities
- Agriculture Services
- Air and Water Purification Equipment Wholesaling
- Air Conditioners Retail
- Air Conditioning and Heating Installation Services
- Air Conditioning Equipment Manufacturing
- Air Freight Transport Services
- Air Transport Services
- Aircraft Charter or Lease
- Aircraft Engine Building or Repair
- Aircraft Leasing
- Aircraft Manufacturing, Maintenance and Repair
- Aircraft Wheels And Brakes Reconditioning Service
- Airline Catering Service
- Airline Ticket Selling
- Airlines and Agents
- Airport
- Airport Bus Service
- Airport Services
- Albums Manufacturing
- Alcohol Counselling Services
- Alcoholic Beverage Wholesalers
- Allergist
- Allergy Aids And Products
- Alternative Health Services
- Alumina Production
- Aluminium Masts Manufacturing
- Aluminium Ores Mining
- Aluminium Products Manufacturing
- Aluminium Smelting
- Ambulance Service
- Ammonia Manufacturing
- Amusement Machines Hiring
- Amusement Machines Manufacturing
- Amusement Park or Centre
- Anaesthetist
- Anatomical Pathologist
- Animal Branding Services
- Animal Breeding
- Animal Care and Welfare
- Animal Dip Manufacturing
- Animal Food Manufacturing
- Antique and Used Good Retailing
- Antique Furniture Retail
- Antique Wooden Furniture Manufacturing
- Antiques Retailing or Auctioning
- Apiarist
- Apple and Pear Growing
- Aquaculture
- Aquarium
- Aquarium Manufacturing
- Archaeology
- Architectural Aluminium Product Manufacturing
- Architectural Services
- Archival Service
- Aromatherapy Service
- Art Dealers
- Art Gallery
- Art Pottery Manufacturing
- Art Restoration And Conservation
- Art School
- Artificial Insemination Service
- Artificial Limbs and Eyes Manufacturing
- Artist
- Artistic Work Investment
- Artists' Supplies Retailing
- Artists' Supplies Wholesaling
- Arts and Crafts Retailing
- Artwork Preparation Service
- Asbestos Removal Service
- Asphalting Services
- Association
- Astrology Service
- ATM
- Auctioning Service
- Audiologist
- Audiovisual Equipment Hiring
- Audiovisual Products and Equipment
- Author
- Auto Electrical Repair
- Auto Parts Recyclers
- Auto Spare Parts Retailing
- Automobile Association
- Automotive Electrical Services
- Aviary
- Aviation Consultant
- Awnings And Blinds Retail
- Awnings Manufacturing
