What are some common Terms & Conditions that may be in a contract?

purchasing contract, services contract, local, national or international These all determine more or less the content of the contract and the terms being used in it ...  

1. First Party
2. Second Party
3. Subject and purpose 
4. Duration ( start and end dates)
5. Territory/ Geography
6. Applicability
7. Terms and conditions
8. Extention and renewal
9. Cancellation 
10. Disputes and dispute settlement
11. Roles and Responsibilities
12. Litigation

and more ....