Business writing must be very accurate, short, and get right to the point. When in the business world no one want to waste time reading filler writing, they want you to get straight to the point. In the business world one should be able to skim the writing quickly and understand it well. However, most writing done by business man is sloppy, and hard to read.
Academic writing is written by professionals in any given practice. This consists of scientific, and technical writing to make sure the point gets out in a very detailed and concise way. Most of the times there will be a list of references
Non-academic writing is writing for the general public. These are not given as much detail and take less time to write. Often consist of journal entries.
In business people mainly use writing to develop contracts. These consist of rules and promises among business’ and people. In a business contract there is an initial offer, then an acceptance or decline, then they must create a relationship and sign a legal document, finally the consideration, which usually deals with payment of money.