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.
IDoc (for intermediate document) is a standard data structure for electronic data interchange (EDI) between application programs written for the popular SAP business system or between an SAP application and an external program.
RFC is also an abbreviation for Request for Comments.
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.
SAPUI5 is SAP's toolkit for building web applications using HTML5.