What is abend?

An abend is a type of error that occurs in a computer program or system. The term abend is shorthand for "abnormal end" and refers to any time when a program or system terminates unexpectedly. This can be caused by a variety of factors, including software bugs, hardware failures, user errors, and other issues. Abends can cause data loss, system crashes, and other problems, so they are typically considered serious issues in computer systems. Debugging and troubleshooting abends can require significant time and resources to diagnose the root cause of the problem and identify a solution.