TRANSPORTATION 
- TRA000000 - General
- TRA001000 - Automotive / General
- TRA001010 - Automotive / Antique & Classic
- TRA001020 - Automotive / Buyer's Guides
- TRA001030 - Automotive / Customizing
- TRA001050 - Automotive / History
- TRA001060 - Automotive / Pictorial
- TRA001140 - Automotive / Repair & Maintenance
- TRA001150 - Automotive / Trucks
- TRA002000 - Aviation / General
- TRA002010 - Aviation / History
- TRA002030 - Aviation / Repair & Maintenance
- TRA002040 - Aviation / Commercial
- TRA002050 - Aviation / Piloting & Flight Instruction
- TRA003000 - Motorcycles / General
- TRA003010 - Motorcycles / History
- TRA003020 - Motorcycles / Pictorial
- TRA003030 - Motorcycles / Repair & Maintenance
- TRA004000 - Railroads / General
- TRA004010 - Railroads / History
- TRA004020 - Railroads / Pictorial
- - - -
- TRA006000 - Ships & Shipbuilding / General
- TRA006010 - Ships & Shipbuilding / History
- TRA006020 - Ships & Shipbuilding / Pictorial
- TRA006030 - Ships & Shipbuilding / Repair & Maintenance
- - - -
- TRA008000 - Navigation
- TRA009000 - Public Transportation