Chapter 1 I NTRODUCTION T oday, more than 12 million people in 120 countries that work for 36,200 companies are using SAP ® on a regular basis. This represents somewhere around 100,600 SAP installations, which had to be built, configured, and, after a while, upgraded to the next release. This process is known as "Upgrading SAP." "Upgrading SAP" provides a complete overview of the upgrade process from one SAP release to the next. In addition, it explains the use of all relevant SAP ®