What is difference between API and Web services?

Related questions

1. Is Google Geocoding API free?
2. Are AdWords worth it?
3. Do Google ads work?
4. What are AdWords scripts?
5. How old is Google AdWords?
6. What is API usage limit reached?
7. How do I change Google ads to expert mode?
8. How effective is Google advertising?
9. Is Google PPC worth?
10. What is Google billing?

Tags

1. #serve
2. #interaction
3. #machines
4. #protocol
5. #service
6. #difference
7. #communication
8. #typically
9. #facilitates
10. #network
11. #means
12. #between
13. #commonly