1. Foreign operations.
In the context of foreign operations, a branch is an alternative to having a subsidiary company.
The foreign branch is a full part of the company headquartered in the home country, rather than being a separate legal entity.
2. Financial institutions.
A physical location in which a bank or other financial institution does business with its customers, especially retail customers.
3. Learning & development.
A sub-category of a field of learning.
For example machine learning is a branch of artificial intelligence.