The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Group (0 members)
- Event (2 members)
- Monetary Grant (0 members)
- Process Type (1 member)
- Database schema (0 members)
- Task (0 members)
- Room (0 members)
- Physical Item Type (2 members)
- Intangible Item (4 members)
- Data format (0 members)
- Non-governmental Organization (2 members)
- Enumeration (6 members)
- Funding Call (0 members)
- Manufacturer (0 members)
- Foundation (0 members)
- Device Type (0 members)
- Association (0 members)
- User (2 members)
- Data tool (2 members)
- Controlled environment (0 members)
- Procedure (1 member)
- How To (1 member)
- Test procedure (0 members)
- Tool (3 members)
- Process (4 members)
- Device (3 members)
- Event Series (1 member)
- Shipment Status (6 members)
- Strict participants process (2 members)
- Analytical Laboratory Process (0 members)
- Organizational sub-unit (4 members)
- Dataset (0 members)
- File (2 members)
- Object property (33 members)
- Pages using duplicate arguments in template calls (1 member)
- Pages with broken file links (2 members)
- Property (6 members)
- Quantity Property (2 members)
- Term (0 members)
- Thing (1 member)