ras A .ras extension file is a binary raster image format file that was developed using the UNIX platform by Sun Microsystems. It uses the bitmap format that is simple to use and has the ability to store data in grayscale, black and white as well as colored pixels. The basic layout of a .ras file begins with a header, is followed by a color map and finally by the image data that is bitmapped.
pdb The .pdb filename extension refers to the program database file format authored by Microsoft. The format is used for storing debugging information about executable files and programming libraries or DLL files. The pdb format was designed to ease the debugging process of executables and program modules by decoupling the debugging information from the end of the program or class library itself to allow the integrated debugger and linker to access the pdb files directly. It doing so, the PDB format facilitates the stepping into/out of runtime libraries. The format and its internals remain the proprietary asset of Microsoft.