This document provides an introduction to ABAP (Advanced Business Application Programming), the primary programming language used to develop applications for SAP systems. It discusses what ABAP is used for, its origins and design, similarities to other programming languages, and the roles of ABAP developers. It also provides high-level overviews of key ABAP concepts, basics of the language, how ABAP programs are stored and executed, different types of ABAP programs, example code, and transaction codes used for ABAP development.