You can access SAP R/3 from various different desktop computers and software. Although the examples here are intended for Windows users, access from other operating systems will be similar.
You start from the Windows desktop. The first step of the actual process will vary from company to company, but there will be either an icon on your desktop or an item on the Windows Start button:
If there's an SAP R/3 icon on your Windows desktop, double-click it to launch SAP R/3.
If there's no icon on the desktop, click the Start button, move through the menu, and click the SAP R/3 menu item to launch SAP R/3.
Some companies also use an intermediate step, where you can make a selection from a list of available clients. Either way, the SAP R/3 logon ...