The Report Document Library provides you with a set of sample reports as well as documentation describing each report. Similar to the Printable Guides, you can access the Report Document Library by clicking Help > Report Document Library.
This will open the start page of the Report Document Library.
On the right, you can select the module that you would like report information about.
For example, select Procurement to open the next page as displayed in the picture below. For each report, a brief description is provided. You can open the report sample file by clicking the name of the report. To get more details about the report, click the More Details... link. The documentation provides information about the report, including its purpose, data, and parameters.