Since my first Windows 98 (and even now on Win7), I could enter the first 6 letters (symbols) of a folder's name and add
~1 after it (when there was just one folder with those six letters in current directory), and it would work as the full name of it. And it appears that if there are more than one folder with the same six first symbols in its name, I can use
FOLDER~2 and so on, and it will open the corresponding folder, as if I entered its full name. Like
c:\progra~1 will open
C:\Program Files and
c:\progra~2 will open
C:\Program Files (x86) on win7 64 bit.
How does this work?