As the title of this post says, we can use a single USB stick to install multiple operating systems in computers. You might be using Win2Flash software to make your pen drives bootable but that software can make your pen drive bootable only for one operating system. I am going to discuss about some cool softwares which offer you to create a single bootable pen drive to install multiple operating systems.

1. MultiBootUSB
This is an open source software which is free and the best thing is that it is portable, it means you don't need to install it in your system. You can use it just after downloading this application by putting its exe file in any external media to use it in any computer.
2. XBoot
XBoot is another tool to create single bootable usb stick for multiple operating systems. All you need is to download the exe file and run it in your computer. Now add the ISO files of your operating systems into its window box.
From there, just click on the Create USB button. The program will prompt you to select the USB drive that you wish to install the ISOs on, and to select the kind of bootloader that you want to use. If your USB stick is formatted to FAT32, XBoot recommends Syslinux. If the USB stick is formatted to NTFS, Grub4DOS is recommended. You could also select Do not install any Bootloader, but since we want the USB stick to be bootable, I don’t see why we’d choose that. Click OK and we’re on the way!