Get serial number for RAM, motherboard, hard disk

We can find the serial numbers of various hardware devices using WMIC.  You can find the commands below. These commands can be executed from Windows command prompt.
Get serial number of RAM chips.

wmic memorychip get serialnumber

This command lists serial number for each RAM module installed on the computer.
Get serial number for hard disks

wmic diskdrive get serialnumber

Get serial number for mother boards

wmic baseboard get serialnumber

Get Serial number for cdrom drive

wmic cdrom where drive='d:' get SerialNumber

Replace ‘d:’ with the drive letter for the cdrom on your computer.