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The “R” in SAP R/3 stands for real-time.

SAP’s early products processed data immediately instead of in overnight batches, which was unusual at the time. R/2 ran on mainframes; R/3 (1992) brought the idea to client–server systems.

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SAP is a German acronym.

The company’s name originally stood for “Systemanalyse Programmentwicklung” and later “Systeme, Anwendungen und Produkte in der Datenverarbeitung” — Systems, Applications and Products in Data Processing.

SAP HANA keeps whole databases in memory.

Introduced around 2010, SAP HANA stores data primarily in RAM and in columns rather than rows, which makes large analytical queries far faster than traditional disk-based databases. It is the foundation of SAP S/4HANA.

SAP was founded in 1972 by five former IBM employees.

Dietmar Hopp, Hasso Plattner, Claus Wellenreuther, Klaus Tschira and Hans-Werner Hector left IBM to build standard software for real-time business processing. Their first customer site was a chemical company, and they worked on its computers at night.