Portable Network Graphic
PNG is essentially a form of storage that losslessly stores data from raster graphics using a deflation algorithm. The intent was for PNG to become a free GIF alternative. Three raster image types are supported – colour, colour-indexed, and greyscale images. All the graphical info data in a PNG image is compressed for easier storage.
Adobe Photoshop bitmap
An essential format for when you want to save bitmap images within a project file for Photoshop. Storing it this way doesn’t use compression, and much of the file’s structure remains preserved. This includes layer hierarchy and masks, colour spaces & two-colour settings, and everything else that facilitates minute bitmap photo adjustment.