Boot multiple Operating Systems from ISO images using USB Disk

Linux has evolved as a giant since its conception. Though there are number of operating systems developed based on open source and commercial versions, the basic kernel is Linux. There are a number of flavors in Open Source Linux Operating Systems and most of them can be downloaded from the internet. The downloaded Operating System is a bootable ISO image, which is to be written to either a CD or DVD depending on the size you have downloaded. If there is another way of testing those operating systems without wasting the CD or DVD, it would be very helpful for students as well as researchers. This paper proposes the alternatives of writing a bootable ISO image to CD or DVD. With the help of USB mass storage devices like Pen Drives or USB Disks, we are able to boot from the ISO images without burning them to CD/DVD or not even extract its contents.