Questions are for desktop engineers.
1. How to make USB bootable?
2. Make a single USB / pan drive to make Bootable for multiple OS included other supporting softwares : Office , Antivirus and other tool.
All of the above problem get sorted out by using a single tool that is called
YUMI Multiboot MultiSystem Bootable USB Flash Drive
If you not found on the list given from Option 1 you can select other OS.
This will support all application software with ISO formatted