Displays and display adapters
Windows 1.0 supported a wide range displays and display adapters available at the time. Because it was a true GUI, graphics mode was mandatory (i.e. you can't run Windows with an MDA display adapter). It supported CGA, Hercules, EGA and VGA-compatible displays in both monochrome and color configurations (where applicable), as well as some proprietary solutions.
Supported displays can be classified into two groups:
These displays and adapters were usually supersets of official IBM standards (e.g. EGA), with minor enhancements to differentiate better from the competition and a reasonable price tag.
These were used mostly in professional environments for desktop publishing, CAD applications, etc. Generally speaking they're proprietary solutions offering very high resolution graphics (often at the expense of color support) at a premium cost.