AnswerThe main difference between memos and business letters is that memos are for internal use and letters are usually for external use. Another difference is that business letter are more formal and have a proper format. Memos are informal.
internal external not internal external not
its internal
Is a salmon internal or external?
What is internal and external sources?
External
internal
external
External. Internal devices would be something like a CD Drive, while an external device is a keyboard or mouse for example.
is a bluegill fish internal or external
internal is in and external is out
internal is in and external is out fertilisation