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Our Digital World Second Edition Chapter 1 Digital Technologies: Exploring a Wealth of Possibilities © Paradigm Publishing, Inc.1
This chapter will help you be able to: Define what a computer is and identify computing devices. Describe the parts of a computer system and their role in turning data into information. Recognize the convergence of computing devices. Identify uses of computers and possible careers. Define information technology and the information processing cycle. © Paradigm Publishing, Inc.2
Main Topics 1.1 Just What Is a Computer? 1.2 Computers in All Shapes and Sizes 1.3 Who Is Using Computers and How? 1.4 What Is Information Technology? © Paradigm Publishing, Inc.3
Why Should You Care? Computers are everywhere in various forms. Understanding computers gives you an edge in the job market. © Paradigm Publishing, Inc.4
1.1 Just What Is a Computer? © Paradigm Publishing, Inc.5
The Definition of a Computer An electronic, programmable device. Categories – Analog computers. – Digital computers. – Computers for communicating. © Paradigm Publishing, Inc.6
computer analog computer digital computer © Paradigm Publishing, Inc.7 Terms to Know
Ask Yourself… What is not true of a digital computer? a.It can process words, numbers, images, and sounds. b.It can perform mechanical operations. c.It can represent data in the form of code. d.It can transmit sounds over the Internet. © Paradigm Publishing, Inc.8
1.2 Computers in All Shapes and Sizes © Paradigm Publishing, Inc.9
Categories of Computers By operating system and manufacturer – Windows- or Linux-based personal computers. – Macintosh computers. By size – Large: supercomputer, mainframe, server. – Mid-sized: Personal, workstation, desktop, laptop. – Mobile: smartphone, digital audio player, PDA. © Paradigm Publishing, Inc.10
Types of Computers Supercomputer Desktop Laptop Tablet PC Netbook © Paradigm Publishing, Inc.11
Future of the PC How does Silverman define a personal computer? What does Silverman mean when he talks about a VPC? Why does Silverman say the need for a powerful device with a big screen will persist? What company is pushing the idea of a post-PC future? What four components make up Silvermans concept of a personal computer ? © Paradigm Publishing, Inc.12
Convergence of Computing Devices Technological convergence. Convergence devices. Role of accessing services online. © Paradigm Publishing, Inc.13
supercomputer petaflop computer cluster render farm desktop computer laptop © Paradigm Publishing, Inc.14 Terms to Know
tablet netbook technological convergence convergence device © Paradigm Publishing, Inc.15 Terms to Know
Ask Yourself… What factor(s) differentiates a netbook from a laptop? a.size b.weight c.lack of optical drive d.All of the above © Paradigm Publishing, Inc.16
1.3 Who Is Using Computers and How? © Paradigm Publishing, Inc.17
Computers in Various Settings Business, home, education, law enforcement, arts, medicine, entertainment. Unique uses. © Paradigm Publishing, Inc.18
Computing Careers Computer engineering (CE) Computer science (CS) Information systems (IS) Information technology (IT) Software engineering (SE) © Paradigm Publishing, Inc.19
Preparing for Computing Careers Analytical subjects. Associates degree with CS or IT focus. Professional certifications. © Paradigm Publishing, Inc.20
ubiquitous computing computer engineering computer science information systems © Paradigm Publishing, Inc.21 Terms to Know
information technology software engineering web development geographic information system (GIS) expert webmaster Internet law web designer © Paradigm Publishing, Inc.22 Terms to Know
Ask Yourself… Which computer career involves writing software programs? a.information technology b.software engineering c.computer science d.None of the above © Paradigm Publishing, Inc.23
1.4 What Is Information Technology? © Paradigm Publishing, Inc.24
Information Technology Involves – Computer-based information systems. – Software applications and computer hardware. Relationship to computer users. © Paradigm Publishing, Inc.25
Playing It Safe Computer-assisted translation software (CAT) Customized dictionaries. Memory programs store phrases. © Paradigm Publishing, Inc.26
Data and Information Computers take data and turn it into information. Computers turn data into information by processing and organizing it. © Paradigm Publishing, Inc.27
Information Processing Cycle © Paradigm Publishing, Inc.28
Input Many ways to input. Binary system. Bits and bytes. © Paradigm Publishing, Inc.29
Processing Role of the CPU. Microprocessors contained on chips. Processor speed measured in hertz. Temporary storage of data in RAM. Cache memory holds frequently used data. © Paradigm Publishing, Inc.30
Cache Memory and Processing Time © Paradigm Publishing, Inc.31
Output Information resulting from processing. Includes monitor display, printed copy, sound through a speaker, and more. © Paradigm Publishing, Inc.32
Storage Permanent storage. Storage capacity measurement. Storage devices include hard disk, DVD, USB flash, and external drive. © Paradigm Publishing, Inc.33
Back It Up! Back up regularly. Some jobs require that backups be kept. © Paradigm Publishing, Inc.34
Terms to Know data information information processing cycle binary system bit byte input © Paradigm Publishing, Inc.35
Terms to Know central processing unit processing microprocessor computer memory random access memory (RAM) cache memory output resolution pixel © Paradigm Publishing, Inc.36
storage file cloud storage DRAM SRAM SDRAM machine cycle instruction register © Paradigm Publishing, Inc.37 Terms to Know
Ask Yourself… One stage not part of the information processing cycle is a.input. b.output. c.computing. d.processing. © Paradigm Publishing, Inc.38
Our Digital World © Paradigm Publishing, Inc.39
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