Apple Inc. sold a variety of LCD and CRT computer displays in the past. Apple stopped producing its own standalone displays in 2016 and partnered with LG to design displays for Macs, the only displays it sells.
In the very beginning (throughout the 1970s), Apple did not manufacture or sell displays of any kind, instead recommending users plug-into their television sets or (then) expensive third party monochrome monitors. However, in order to offer complete systems through its dealers, Apple began to offer various third party manufactured 9" monochrome monitors, re-badged as the Monitor II.
Apple's manufacture history of CRT displays began in 1980, starting with the Monitor /// that was introduced alongside and matched the Apple III business computer. It was a 12" monochrome (green) screen that could display 80x24 text characters and any type of graphics, however it suffered from a very slow phosphor refresh that resulted in a "ghosting" video effect. So it could be shared with Apple II computers, a plastic stand was made available to accommodate the larger footprint of the monitor.
Roughly 4 years later came the introduction of the Apple manufactured Monitor //, which as the name implies, was more suited in look and style for the Apple II line and at the same time added improvements in features and visual quality. In 1984 a miniature 9" screen, called the Monitor IIc, was introduced for the Apple IIc computer to help complement its compact size. This monitor was also the first to use the brand new design style for Apple's products called Snow White, as well as being the first monitor not released in a beige color, but rather a bright, creamy off-white. By early 1985 came the first color CRT's, starting with the Monitor 100, a digital RGB display for the Apple III and Apple IIe (with appropriate card), followed shortly by the 14" ColorMonitor IIe (later renamed to AppleColor Composite Monitor IIe) and ColorMonitor IIc (later renamed to AppleColor Composite Monitor IIc), composite video displays for those respective models. All of the Apple monitors are capable of supporting the maximum Apple II Double Hi-Res standard of 560x192.