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APT: Advanced Packaging Tool BASH: Bourne Again Shell BIOS: Basic Input/Output System DEB: Debian GNU: GNU's Not Unix GPT : GUID Partition Table GUI: Graphical User Interface GUID: globally unique identifier KSH: Korn Shell MBR : Master Boot Record POSIX: Portable Operating System Interface RHEL: Red Hat Enterprise Linux RPM: Red Hat Package Manager TCSH: TENEX C Shell UEFI: Unified Extensible Firmware Interface UNIX: Uniplexed Information and Computing System YUM: Yellowdog Updater, Modified ZSH: Z Shell\