The ARO2C Network provides a record retention guide. It covers all accounts receivable documents, including manuals. At the bottom of that guide you'll find a link to IRS Publication 583, Starting a Business and Keeping Records, which provides additional information.
For other areas, you should be able to find a number of guides and lists on the web simply by searching for "record retention guide" or "document retention guide." Be sure to consider the source of the results you find, and be warned, not all records retention guides will agree. For example, while many lists cite seven years as the length of time to keep accounts receivable ledgers and schedules, a few cite six years. Here are a few lists you might find helpful:
There are also lists that focus on specific areas in some detail, for example, human resources records. These sites address those:
Some states provide information as well, often tied to specific statutes. See the state websites.