The Computer Name / NetBIOS friendly name, but.....
You may have to get creative as I believe it only supports 15 characters
So a Surface Pro 4 Tablet, running Windows 10 Pro, might look something like this
SP4_W10Pro_Tab (or DT for DeskTop or LT for LapTop instead of Tab for Tablet).
OR
You might consider a desktop overlay like this
https://technet.microsoft.com/en-us/sysinternals/bb897557.aspx
It's pretty customizeable depending on what you want to do.
Your post is not exactly clear as to what you are attempting to accomplish.