fullform

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\