<u>R-> Real time processing</u>
SAP R/3 is SAP's integrated software solution for client/server
and distributed open systems.
SAP's R/3 is the world's most-used standard business software for client/server computing.
R/3 stands for Real Time and 3-tier architecture.
R/2 is SAP AG mainframe software that runs on IBM, Siemens and other compatible equipment.