# Resources

Helpful links relating to the Numbers API.

## Common terms

A few common terms for the Numbers API:

- [10DLC](https://community.sinch.com/t5/10DLC/What-is-10DLC/ta-p/7845)
- [TCR](https://community.sinch.com/t5/10DLC/What-is-The-Campaign-Registry-TCR/ta-p/7024)
- [Long number](https://community.sinch.com/t5/Glossary/Long-Number/ta-p/7596)
- [Short number](https://community.sinch.com/t5/Glossary/Short-Codes-SC/ta-p/7710)
- [Supporting documentation](https://community.sinch.com/t5/Virtual-Numbers/Supporting-documentation-for-virtual-numbers/ta-p/8161)
- [Vetting score](https://community.sinch.com/t5/Glossary/Vetting-score/ta-p/8818)
- [Virtual number](https://community.sinch.com/t5/Glossary/Virtual-phone-number/ta-p/7793)


For a more robust glossary of terms, check out our [full Sinch Support Community glossary](https://community.sinch.com/t5/Numbers/ct-p/Numbers).

## FAQ highlights

Here are a few of the most asked questions from our FAQ and knowledge base on our [Sinch Support Community](https://community.sinch.com/t5/Numbers/ct-p/Numbers). If you don't see your topic, [view the whole knowledge base](https://community.sinch.com/t5/Numbers/ct-p/Numbers).

- [What kind of number do I need?](https://community.sinch.com/t5/tkb/workflowpage/tkb-id/VirtualNumbers/article-id/22?prePageCrumb=TkbDashboardPage)
- [What's The Campaign Registry (TCR)?](https://community.sinch.com/t5/10DLC/What-is-The-Campaign-Registry-TCR/ta-p/7024)
- [What's a project and where do I find the key and secret?](https://community.sinch.com/t5/Virtual-Numbers/What-is-a-project-and-where-do-I-find-the-key-and-secret/ta-p/8794)
- [Supporting documentation for virtual numbers](https://community.sinch.com/t5/Virtual-Numbers/Supporting-documentation-for-virtual-numbers/ta-p/8161)