The PCX (Personal Computer eXchange) image format is an older raster graphics file format that was widely used in the early days of personal computing. Developed by ZSoft Corporation, PCX files support various color depths and compression methods, making them suitable for storing images with different levels of complexity. PCX files were commonly used in DOS-based graphics applications and early versions of Windows. However, due to limitations in terms of color depth and compression efficiency, the PCX format has largely been replaced by more modern and versatile image formats in contemporary computing environments.