its the name of a DHCP daemon. It can be used to manage ip adresses in a network.
/etc/rc.d/init.d/dhcpd
It stands for Red Hat Package Manager, which is a package management system that will run on Linux.
Redhat Package Manager
LDAP data interchange format
Linux Pluggable Authentication Modules (PAM) provide dynamic authorization for applications and services in a Linux system. Linux PAM is evolved from the Unix Pluggable Authentication Modules architecture.
Yet Another Setup Tool = YaST for SUSE Linux
su = switch user RTFM, Luke...
It's a protocol for use in CUPs to connect to network-enabled printers.
Scalable Disk Array =D Anthony Hopkins - not the actor
Linux does not technically stand for anything. It's name was originally created as a shortened form of "Linus's Minix." As this is not really technically accurate, and Linux has grown far beyond Minix in popularity, the name stands as a word in its own right.
The accronym "GNU" stands for Gnu Is not Unix. Technically speaking, it's "GNU/Linux" because Linux is the kernel, not the whole thing, we just shorten it to Linux (I do this myself, but I do know that Linux is just the kernel). It is made up of the Linux kernel and several GNU programs (try typing a basic command into a terminal with --help, chances are you could easily find one that says GNU somewhere at the bottom).
NAT stands for Network Address Translation. The term "NAT" is the same across all computing platforms.