Definition(en): Psion Series 3 Bitmap (also known as Psion PIC or EPOC PIC) is a raster image file format associated with Psion's EPOC operating system, and used mainly on Psion PDA devices. A Psion PIC file contains one or more bi-level bitmaps. Sometimes, two bitmaps need to be combined to make a 4-tone grayscale image.