Uniquely identify a PC

I got the following information from http://aumha.org/win5/a/wpa.htm,

The WPA system checks ten categories of hardwa

1. Display Adapter
2. SCSI Adapter
3. IDE Adapter (effectively the motherboard)
4. Network Adapter (NIC) and its MAC Address
5. RAM Amount Range (i.e., 0-64mb, 64-128mb, etc.)
6. Processor Type
7. Processor Serial Number
8. Hard Drive Device
9. Hard Drive Volume Serial Number (VSN)
10. CD-ROM / CD-RW / DVD-ROM

Is there an easy way to obtain the above information such as using a
script? I am looking for ways to uniquely identify a PC.

thanks!