Examples include temperature loggers, timers, voltage and current sensors, battery monitors, and memory. USB hubs are often built into equipment such as computer cases, keyboards, monitors, or printers. The resolution for computer monitors has increased over time. Modules can also incorporate cooling mechanisms, temperature monitors, and other devices. It is implemented on most modern flat-panel monitors and televisions. A TSR program that continuously monitors the computer for viruses. The Avast Business Managed Workplace monitors and manages desktops, and assesses on-site security protocols. A second system monitors other vehicle parameters. Sony discontinued its series of Trinitron computer monitors in 2005. These systems are commonly known as Oil Life Monitors or OLMs. It is implemented on most modern flat-panel monitors and TVs. Many of these hardware monitors also have fan controlling capabilities. The computerised OCC monitors and controls all train movements. China monitors its citizens through Internet, camera as well as through other digital technologies. It also monitors and logs the UPS status.