Dell Service Tag using PowerShell

Today I needed to know the "Dell Service Tag" of a machine in another room.  The service tag is always printed on a sticker on the chassis of the machine. Dell also stores the Service Tag in the "SerialNumber" field of the System BIOS. So, when you are too lasy to go look at the machine, you can run this PowerShell command:

(Get-WmiObject -Class Win32_Bios).SerialNumber