VFSdos is a DOS shell console, text-based environment for Palm handheld computers equipped with a VFS expansion slot (such as the m505, Clie, Handera, and TRGpro). Its not only used for simple DOS file operations - its a DOS environment where VFSdos applications and batch files can be executed from SD/MMC/MC/CF cards. It is targeted to DOS programmers, so they can continue to write and test plain DOS code on their Palm computers.