It can be handy to create USB installation media from bootable ISOs (Windows, Linux, UEFI, etc.) If you need to work on a system without an operating system, you need to flash a BIOS or other firmware from DOS or run a low-level utility.
Ventoy lets you copy ISO/WIM/IMG/VHD (x)/EFI files to a USB drive and boot them directly without formatting. It supports various OS, partition styles, UEFI modes, persistence, auto installation and more features.