DOS MZ executable format

Hi all,

I recently checked some *.exe, *.com and *.dll Files with Notepad.
I did notice, that they all start with the Caracters "MZ"

I found some explanation in Wikipedia

DOS MZ executable

The DOS MZ executable format is the executable file format used for .EXE files in DOS.
The file can be identified by the ASCII string "MZ" (hexadecimal: 4D 5A) at the beginning of the file (the "magic number"). "MZ" are the initials of Mark Zbikowski, one of the leading developers of MS-DOS.

Out of curiousity i have created a TXT File starting with the MZ Characters.

If you try to execute a File starting with MZ Characters, the following Error Message appears

Andres Bohren