These are reference services that provide IDs for things such as language and cities. Once you have the ID you can use them elsewhere, as in the Profile Service.
- Ad Server Service
- Brand Company Service
- Brand Service
- Browser Service
- Carrier Service
- Category Service
- City Service
- Country Service
- Creative Format Service
- Currency Service
- Deal Buyer Access Service
- Delivery Type Service
- Designated Market Area Service
- Device Make Service
- Device Model Service
- Domain Audit Status Service
- Duration Service
- Genre Service
- Inventory Attribute Service
- Inventory Resold Service
- Label Service
- Language Service
- Lookup Service
- Media Subtype Service
- Media Type Service
- Mobile App Instance Service
- Mobile App Service
- Mobile App Store Service
- Native Custom Key Service
- Network Service
- Object Limit Service
- Offline Attribution Product Group Service
- Operating System Extended Service
- Operating System Family Service
- Operating System Service
- Package Buyer Access Service
- Platform Member Service
- Political District Service
- Postal Code Service
- Profile Summary Service
- Program Type Service
- Rating Service
- Region Service
- Report Status Service
- Search Service
- Technical Attribute Service