Abstract
This study attempts to show how the purpose of three types of business and technical documents (instructions, annual reports, and sales promotional letters) affects the syntactical and rhetorical choices authors make in writing these documents. While the results of the examination rendered some predictable results, there were some surprises in the absence of many rhetorical schemes in sales promotional letters. Another value of this study is that it provides partial syntactical and rhetorical “fingerprints” of three important documents in business and technical writing to offer students norms they can go by in constructing such documents.