FQDN

Fully Qualified Domain Name

GNU

GNU project (GNU is Not Unix)

HTML

HyperText Markup Language

HTTP

HyperText Transfer Protocol

HTTPS

HyperText Transfer Protocol Secure (over SSL/TLS)

ID

Identifier

IMAP

Internet Message Access Protocol (email protocol)

IP

Internet Protocol

MBR

Master Boot Record

NSS

Novell Storage Services

PID

Process ID (system process identifier)

PAM

Pluggable Authentication Modules

POP

Post Office Protocol (email protocol)

RPM

Red Hat Package Manager

SMTP

Simple Mail Transfer Protocol (email protocol)

SP

Service Pack

SSH

Secure Shell

SSL

Secure Sockets Layer

TCP

Transmission Control Protocol

TLS

Transport Layer Security

UID

User ID (system user identifier)

URL

Uniform Resource Locator

VBR

Volume Boot Record

OS

Operating System