Automated teller machines (ATMs) have provided convenient access to money for over four decades. However, their security has always posed challenges. The document outlines several security tips for ATMs, including scheduled physical checks by staff, detection systems for card skimmers, software that analyzes transaction behavior, and access control lists that define what processes and resources each ATM is permitted to use. Implementing multiple security measures can help banks and credit unions protect ATMs from fraud and criminal activity.