CRT (cathode-ray tube) monitors are one of the earliest types of analog computer displays widely available, relying on a vacuum tube and an electron gun to produce images on-screen. 

What is a CRT used for?

While overshadowed by newer and more sophisticated digital displays such as LCD and OLED, some swear by CRTs today for their superior color clarity and response time. 

Are CRT Monitors Still Made?

Although some companies still produce CRTs today, the vast majority used today are no longer being produced and are purchased second-hand as a cheaper alternative to LCD and OLED monitors.