SAP R/2

SAP R/2 is an older version of real-time enterprise resource planning software produced by the German company SAP AG, that was replaced by SAP R/3.
SAP R/2 was launched in 1979 and followed the company's first product, a materials management module called RM/1, which was launched in 1975 and became part of R/1. What was unique about R/2 was that it was a packaged software application that processed real-time on a mainframe computer taking advantage of Time Sharing Option and integrated all of an enterprise's functions, such as accounting, manufacturing processes, supply chain logistics and human resources.
The modules of R/2 included: RF / RK, RM, Inventory Management, Production Planning, Quality Management, Plant Maintenance ; RV ;RK-P RP.