This Documentation: Link to Corresponding General Documentation 
SAP Retail
is a fully integrated, self-contained system comprising all the functions you require to model retail business processes. SAP Retail also includes general R/3 components such as Financial Accounting, Controlling and Human Resources.At the heart of the SAP Retail system are functions specially developed for retailing. This is based on the R/3 Materials Management (MM), Sales and Distribution (SD), and Warehouse Management (WM) components.
This documentation describes the SAP Retail functions developed specifically for retailing. Many topics do, however, contain references to additional information in other areas of the R/3 library. These references point you to the relevant part of the documentation.
In certain circumstances – for example, if your company also has manufacturing operations – you may use some components that are purely MM, SD or WM. In this case, you can reach the documentation for these areas by choosing Help ® R/3 library from the menu.

If you follow a link to another part of the R/3 library, the text that appears has a different structure to this documentation. Also, the terminology used is not specific to the retail sector but is the general terminology used throughout the whole SAP system.
For further information on the different terminology, see Retail Terminology.