The following is a list of the general subjects under which the trade literature is organized.

• Agriculture
• Astronomy
• Audio
• Bookbinding
• Chemistry
• Clothing and Footwear:includes sewing and knitting machines
• Comprehensive:general catalogues, such as from Sears, Eatons, etc.
• Computers
• Construction
• Electricity
• Electronics
• Exploration and Survey
• Fire Technology
• Fishing
• Food Processing
• Forestry
• Fossil Fuels
• Furnishings
• Glass and Synthetics
• Hardware
• Housekeeping
• Hunting and Trapping
• Industrial:industrial processes and tools used in cottage industries
• Land Improvement and Maintenance
• Leatherworking
• Machine Tools
• Marine Transportation
• Masonry
• Mathematics
• Medical
• Metalworking/Metallurgy
• Meteorology
• Metrology
• Mining
• Motorized Ground Transportation
• Music
• Non-Motorized Ground Transportation:human- or animal-powered means of transporting people and goods
• Office Equipment and Supplies
• Personal Gear
• Photography
• Physics
• Plumbing
• Power Production and Transmission
• Printing
• Radar
• Radio
• Rail Transportation
• Scientific and Laboratory Equipment
• Solid State Devices
• Space
• Sport and Recreation
• Telegraphy
• Telephony
• Television
• Temperature Control
• Test Equipment:testing and maintenance of electronics equipment, and testing for industrial processes
• Textile Working
• Timekeeping
• Vacuum Tubes
• Woodworking