


With the advent of distributed client–server computing, SAP SE brought out a client–server version of the software called SAP R/3 (the "R" was for "Real-time data processing" and "3" was for " 3-tier": 1) database, 2) application server, and 3) client (SAPgui)). It was particularly popular with large multinational European companies that required soft-real-time business applications, with built-in multi-currency and multi-language capabilities.

SAP R/2 was a mainframe-based business application software suite that was very successful in the 1980s and early 1990s. The current successor software to SAP R/3 is known as SAP S/4HANA. It is an enterprise-wide information system designed to coordinate all the resources, information, and activities needed to complete business processes such as order fulfillment, billing, human resource management, and production planning. SAP R/3 is the former name of the enterprise resource planning software produced by the German corporation SAP AG (now SAP SE).
