Definition of IT terms.

1
Definition of IT terms.

• Cloud computing
• Electronic security
• Network operating systems and utility software

2
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.

3
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.

4
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...

5

• http//en.wikipedia.org/wiki/Utility_software
• http//searchcloudcomputing.techtarget.com/definit
  ion/cloud-computing
• http//www.apple.com/mobileme/http//www.google.fr
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