Did you know that a full copy of Windows can be installed and run from a USB drive? Microsoft introduced "Windows To Go" with Windows 8 Enterprise and has continued supporting the feature in Windows 10, which can be kept on a pen drive in your pocket as a portable operating system.
Do you keep a bootable USB drive handy? Since we only tend to keep a few USB drives available, we tend to overwrite the contents of Windows installation media and the like after a single use. Intending to save some time and effort on the next go-around, we sought methods to preserve an exact copy of bootable USB drives which could be restored from a backup file when needed.
The subject of who first invented the USB flash drive is contested, but most attribute it to IBM