The MIME type application/x-msdos-program is used to denote the presence of MS DOS application and executable files and. This MIME type falls under the "application" category.

MS DOS program files are files that are either directly executable within the DOS environment or are files that support low level system functions and other programs. These files may carry the following extensions � EXE, COM, SYS and OVL. These files are often automatically blocked from being transmitted across networks. Because of their nature as executables they are very easily impregnated with malicious code that can damage a system that receives and executes the malicious code injected file. Viruses and other malware also often masquerade as legitimate program files. These are not infected files but are malware programs designed to look like program files on the outside.

Some of these executable files are also found on the advanced Windows platform. The extensions are the same but the architecture is often different.

DOS stands for Disk Operating System. It is proprietary command line interface based operating system that is owned by Microsoft. It was popular on personal and business computers before the GUI based Windows platform was introduced to the market.