Definition of IT terms.

Cloud computingElectronic security

Network operating systems and utility software

Cloud Computing.

Definition: Cloud computing is a general term for anything that involves delivering hosted

services over the Internet. These services are broadly

divided into three categories: Infrastructure-as-a-Service (

IaaS), Platform-as-a-Service (PaaS) and Software-as-a-Service (SaaS). The name

cloud computing was inspired by the cloud symbol that's often used to represent the Internet in flowcharts and

diagrams.

Electronic Security

Definition: Protection resulting from all measures

designed to deny to unauthorized persons information of value

which might be derived from the

possession and study of electromagnetic

radiations.

Network operating systems and utility software

Network operating systems: A network operating system (NOS) is a software

program that controls other software and hardware that runs on a network. It also allows

multiple computers, also known as network computers, to communicate with one main

computer and each other, so as to share resources, run applications, and send

messages, among other things. A computer network can consist of a wireless network,

local area network (LAN), a wide area network (WAN), or even two or three computer

networks. The heart of any of these networks, however, is the network operating system.

Utility Software: a kind of system software designed to help analyze,

configure, optimize and maintain the computer. A single piece of utility software is usually called a utility (abbr. util) or tool

Eg: Antivirus, Disk storage, file managers...

http://en.wikipedia.org/wiki/Utility_software

http://searchcloudcomputing.techtarget.com/definition/cloud-computing

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