FreeDOS 1.2 Installation or Live MS DOS Compatible OS 4G USB Stick My preferred payment method is PayPal. Seller chooses shipper (UPS or USPS)! FreeDOS is a free operating system for IBM PC compatible computers. It provides a complete DOS-compatible environment for running legacy software and supporting embedded systems. FreeDOS can be booted from USB flash drive. It is designed to run well under virtualization or x86 emulation. Unlike most versions of MS-DOS, FreeDOS is composed of free and open-source software, licensed under the terms of the GNU General Public License. Therefore, its base distribution does not require license fees or royalties and creation of custom distributions is permitted. Can be run or installed from this live USB installation (if your PC offers a ?boot from USB? option. You may have to press a certain key at boot time or modify your bios settings to change the boot order). Due to the non-returnable nature of digital products all sales are final.