Picture Exchange, aka, PC Paintbrush

PCX, standing for PiCture eXchange, was the native file format for PC Paintbrush and became one of the first widely accepted DOS imaging standards, although it has since been succeeded by more sophisticated image formats.

See the reference side-by-side comparison Common image file formats

	PCX
Developed by	ZSoft Corporation
Year	1985 (version 1) 1991 (version 5)
Pros	Image information retained Good quality image
Cons	Large file format PC compatible only and older PCX versions only support 256 colours.
Features
Vector graphics	No
Raster image	Yes
Lossless	Yes
Animation support	No
Transparency support	Yes
Layers support	No
HDR	No
Maximum bit depth	8-bit
CMYK support (for print)	No
Maximum number of channels	4
Commonly used for	with Paintbrush software Mainly in the MS-DOS world. It is mainly an exchange and storage format
Browser support (without plugin)
Google Chrome	No
Microsoft Edge	No
Safari	No
Firefox	No
Opera	No
Internet Explorer	No
Additional
File extensions	.pcx
Wikipedia	https://en.wikipedia.org/wiki/PCX