CHAPTER 3 & MICROSOFT WORD

CHAPTER 3: COMPUTERS AND MOBILE DEVICE

Computers and mobile devices:

1)      Desktops and mobile computers

Personal computer (PC)-a computer that can perform all of its input, processing, output, and storage activities by itself and is intended to be used by one person at a time	Mobile computer-a portable personal computer, designed so that a user easily can carry it from place to place	Desktop-a personal computer designed to be in a stationary location, where all of its components fit on or under a desk or table
Laptop-thin, lightweight mobile computer with a screen in its lid and a keyboard in its base	Tablet-a thin, lightweight mobile computer that has a touch screen	Handheld computer-a computer small enough to fit in one hand

2)      Servers and terminals

Server-a computer dedicated to providing one or more services to other computers or devices on a network

Rack server	Blade server	Tower server	mainframe

Supercomputer-the fastest, most powerful computer and the most expensive.

Differentiation of server with supercomputer

SERVER	SUPERCOMPUTER
Serves bits and bytes of data that enter and leave the server	Regular hardware combined in enormous proportions
Web servers-processing requests from surfers and sending them back data	Contain so many processors
Web browsers - assemble that data to generate Web pages	Predict the weather, build airplanes, model the brain and simulate the way the planet works.
Server send files in a network.	Sequoia Blue Gene/Q supercomputer processing 504 billion events per second(2013) ≈1 million desktop computers.

Terminal-a computer, usually with limited processing power, that enables users to send data to and/or receive information from a server, or host computer

Automated teller machine (ATM)	Self-service kiosk

3)      Mobile device

Smartphone-Internet-capable phone that usually also includes a calendar, an appointment book, an address book, a calculator, a notepad, games, browser, and numerous other apps	Digital camera-a mobile device that allows users to take photos and store the photographed images digitally
Portable media player-a mobile device on which you can store, organize, and play or view digital media	Electronic book reader-used primarily for reading e-books and other digital publications

4)      Game devices

5)      Embedded computers

Embedded computer is a special-purpose computer that functions as a component in a larger product.

Ports and connections:

Port- the point at which a peripheral device attaches to or communicates with a computer or mobile device so that the peripheral device can send data to or receive information from the computer or mobile device	Connector-joins a cable to a port

Wi-Fi

Bluetooth

NFC

Protecting hardware:

•       A surge protector, also called a surge suppressor, uses electrical components to provide a stable current flow and minimize the chances of an overvoltage reaching the computer and other electronic equipment.

•       An uninterruptible power supply (UPS) is a device that contains surge protection circuits and one or more batteries that can provide power during a temporary or permanent loss of power.

Health concerns of using technology:

•       A repetitive strain injury (RSI) is an injury or disorder of the muscles, nerves, tendons, ligaments, and joints

•       Computer vision syndrome (CVS) is a technology-related health condition that affects eyesight

•       Ergonomics is an applied science devoted to incorporating comfort, efficiency, and safety into the design of items in the workplace

•       Technology addiction occurs when the technology consumes someone’s entire social life.

MICROSOFT WORD 

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