How do I select the appropriate program type? Where should the local declarations of a procedure be positioned? Am I supposed to immediately replace all obsolete language elements in existing code? Should I use procedural or object-oriented ABAP? The official ABAP programming guidelines provide clarity and security by answering these questions, and many more that may arise in your daily work. Readers learn the general principles that should be taken into account when you create new programs and classes and find the answers to your questions on style, including naming, commentation, and structure of programs and procedures. Plus, explore guidelines on individual aspects of architecture, such as object orientation, error handling, user interfaces, data storage, and much more. With this book you'll be able to ensure your ABAP programs run predictably with surprises by gaining in-depth kwledge on data types and data objects, calculations and accesses, internal tables, and more. That's just for starters! Explore volumes of practical tips and expert insights throughout the book, as well as examples of good and bad ABAP programming, to help you adopt effective working techniques and principles.