This document discusses industrial automation and timers. It describes industrial automation as using computerized or robotic devices to complete manufacturing tasks. It then provides examples of different types of automation including building, office, scientific, light, and industrial automation. The document goes on to describe timers, explaining that timers are used to activate or deactivate devices after a preset time interval. It discusses on-delay and off-delay timers and provides examples of on-delay timer symbols. Finally, it mentions some applications of timers, such as to operate bells in schools and as alarms in watches.