BrE and AmE also sometimes follow different conventions with regard to the use of prepositions and articles. Some of the most common examples include:
BrE | AmE |
You enrol on a course. | You enroll in a course. |
You convalesce in hospital. | You convalesce in the hospital. |
You go out at the weekend. | You go out on the weekend. |
You play in a team. | You play on a team. |
An office is open Monday to Friday. | An office is open Monday through/to Friday. |
You study English at university. | You study English in college. |
You ring/call someone on 867-5309. | You call someone at 867-5309 |
Additional examples can be found on Wikipedia.