Is a backpack considered a carry on United?

Related questions

1. Do I have to pay for baggage on United Airlines?
2. What is united basic economy?
3. Can you check a bag with basic economy united?
4. How many bags can I check on United Airlines?
5. Can I bring a backpack for basic economy united?
6. How much is first checked bag on United?
7. Does United weigh carry on bags?
8. What if my bag is over 50 lbs united?
9. What airlines let you check bags for free?
10. How strict is United Airlines about carry on baggage?

Tags

1. #charge
2. #board
3. #travelers
4. #shoulder
5. #laptop
6. #bring
7. #inches
8. #dimensions
9. #small
10. #carry
11. #other
12. #maximum
13. #personal
14. #backpack