What are the advantages and disadvantages of the three primary business writing formats?

Answer:

A Memorandum is a formal, internal communication tool which allows companies to communicate with their employees. It is generally used to deliver announcements or problems. Memos are quickly becoming replaced by e-mail because it is more complicated and expensive to deliver a memo. A Business Letter is a formal communication tool which is best utilized for communicating with customers. Writing and formatting a business letter generally takes more time than composing a memo or e-mail. E-mail is quick, easy and cheap, and allows you to send messages instantly to any number of people. E-mail has many unwritten rules of etiquette and can be too informal for many business purposes.