Rak na ituu!!! CHAPTER 1 ALL ABOUT COMPUTER

WHAT IS A COMPUTER? Can be defined as an electronic device that performs rapid computations and generates desired output for users based on input data and programs.

DATA AND INFORMATION DATA – is a collection of unprocessed items, which include numbers, audio videos, text and images. INFORMATION – conveys meaning and is useful to people

CHARACTERISTICS OF COMPUTER SPEED – millisecond (thousandth), microsecond (millionth), nanosecond (billionth) and picosecond (trillionth).

1 second

CHARACTERISTICS OF COMPUTER ACCURACY – process data according to the sequence of instructions.

CHARACTERISTICS OF COMPUTER HUGE STORAGE AND FAST RETRIEVAL MEMORY TYPES: MAIN MEMORY, CACHE MEMORY AND SECONDARY (AUXILLARY STORAGE).

CHARACTERISTICS OF COMPUTER VERSATILITY FATIGUE-FREE – it doesn’t get tired of work and never loses concentration.

CHARACTERISTICS OF COMPUTER PROGRAMMABLE – can be program to function automatically and this differentiates it from any other calculating device. NETWORKING CAPABILITY – computers can be interconnect into a network.

CATEGORIES OF COMPUTER Personal (desktop) Mobile computers and mobile devices Game consoles Mainframe Supercomputers Embedded computers

CONVERGENCE May nag tweet! Rapidly changing technology, however, the distinction among categories is not always clear-cut (very definite)

PERSONAL COMPUTERS Is a computer that can perform all of its input, processing, output, and storage activities itself. 2 types of personal computers: desktop computers notebook computers

DESKTOP COMPUTER Is designed so that the system unit, input devices, output devices and any other devices fit entirely on under a desk or table. Ex: gaming desktop, home theatre PC (HTPC)

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MOBILE COMPUTERS AND MOBILE DEVICES Mobile computer – personal computer you can carry from place to place Mobile device – similar to Mobile computer but it is small enough to hold in your hand. notebook computer

NOTEBOOK COMPUTER Also called as Laptop computer, a portable, personal computer often designed to fit on your lap. types of notebook netbook ultra-thin

TABLET PC’s Special type of notebook computer that you can interact with by touching the screen with your finger or a digital pen. (uses pressure rather than ink) it also uses voice input so that users can speak to a computer. Convertible tablet has attached keyboard. State tablet provides other means for typing.

MOBILE DEVICES Small enough to carry in a pocket usually do not have hard drives instead using of special memory to store programs and other some use small storage such as memory cards. Popular types: smart phones and PDA’s, e- book readers, handheld computers, portable media players and digital cameras

SMART PHONES AND PDAs Smart phone – internet enabled phone, provides information, calendars appointment book, address book, calculator, notepad, send and receive email. Also provides portable media player, built-in digital cameras, cable of using word processing, spreadsheet, and games.

SMART PHONES AND PDAs PDA – (Personal digital assistance) differs from smart phone in that is usually does not have phone capabilities and may not be internet-enabled, support voice input, built-in camera, function as portable media player.

Chura moh! handhelds Difficult to differentiate the SP and PDA which leads some manufacturer to refer them as simply handhelds.

E-BOOK READERS Short for electronic book reader or e- reader. Used for reading books An electronic version of a printed books Internet-enabled and touchscreen Usually smaller than tablet but larger than smart phone

HANDHELD COMPUTER Sometimes referred to as an Ultra-Mobile PC, a small PC that small enough to fit in one hand. Use wireless technology Digital pen or stylus for input.

MP7.50 PORTABLE MEDIA PLAYER MP6 MP3 MP5 MP7 MP4 Is a mobile device on which you can store, organize and play digital media. Internet-enabled Calendar, address book, games and other apps. MP6 MP3 MP5 MP7 MP4 MP7.50

#SELFIE DIGITAL CAMERAS Is a device that allows users to take pictures and store photographed images digitally, instead of on traditional film Internal memory and memory cards Reviewing and modifying while using camera Wireless technology #SELFIE

GAME CONSOLES Is mobile computing device designed for single-player or multiple video games. Standard game consoles use a handheld controller(s) as an input device Television as output Hard disk and/or memory card as storage Microsoft xbox 360, nintendos wii, sony’s playstation 3

MAINFRAMES COMPUTER A large and expensive, powerful computer that can handle hundreds or thousands of connected users simultaneously. Can also act as server You can use terminals or personal computers to access the mainframe

SUPERCOMPUTERS Fastest, most powerful computer – and the most expensive. Can process more than 1 quadrillion instructions in a single second Can store 20,000 times than desktop computer

EMBEDDED COMPUTER Special purpose computer that functions as a component in a larger product

EMBEDDED COMPUTER Consumer electronics Home automation devices Automobiles Process controllers and robotics Computer devices and office machines

BASIC FUNCTION OF COMPUTER INPUT OUTPUT PROCESS STORAGE

© Copyright 2011 John Wiley & Sons, Inc.

© Copyright 2011 John Wiley & Sons, Inc.