Application Link Enabling (ALE) is a mechanism for the exchange of business data between loosely-coupled R/3 applications built by customers of SAP, the enterprise resource management program.
R/2 is a set of coordinated business applications from SAP, a German company that introduced the product in 1979. R/2 gained popularity until the mid-1990s, when it was superseded by the more capable R/3 product, later updated by mySAP.com.
SAP HANA App Center is a cloud-based service that connects buyers and sellers to applications that were developed on SAP's HANA in-memory database platform.
SAP SQL Anywhere is an embedded RDBMS that makes it possible to develop applications that integrate IoT data with business data and can run outside of traditional data centers.