Understanding File Extension SYS
A filename extension is a suffix to the name of a computer file applied to indicate the encoding convention (file format) of its contents. File extensions point back to the original application that created them or simply markers of the application. These markers allow us and the computer to determine what type of applications can open these files. In some operating systems (for example Unix) it is optional, while in some others (such as DOS) it is a requirement. Some operating systems (for example RISC OS) do not use file extensions.
File Extension SYS is mostly used for system files for Microsoft operating systems. Files with File Extension SYS are better known as system files. They are commonly used by the DOS and Microsoft Windows operating systems, and are used to store required system settings and variables. These files contain driver information and several computer configurations. They can be opened on platforms PC and Mac. Files with File Extension SYS are only accessible on Mac platforms with Windows components installed. Most sys files are hidden and protected by the operating system. Editing these files is highly discouraged. Some third party applications create their own sys files for proper configuration. CONFIG.SYS contains essential instructions set for a computer to function including DOS configuration while MSDOS.SYS contains the real DOS information. In most systems, sys file can be accessed through C:\Windows\system32 address.
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