ASCII 255 used to be fun in the Windows 3.1 days. DOS would handle just fine (displaying whitespace). The Windows Explorer (or whatever it was called back then)

ASCII 255 used to be fun in the Windows 3.1 days. DOS would handle just fine (displaying whitespace). The Windows Explorer (or whatever it was called back then) would not let you select a directory named like that. Basically this made a directory inaccessible, unless dealing with very tech savvy people.