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Capítulo 1 Our Digital World

Introducción a las tecnologías digitales

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Capítulo 1 Our Digital World

  1. 1. Our Digital World Chapter 1 Digital Technologies:Exploring a Wealth of Possibilities © Paradigm Publishing, Inc. 1
  2. 2. 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
  3. 3. 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
  4. 4. Why Should You Care?• Computers are everywhere in various forms.• Understanding computers gives you an edge in the job market. © Paradigm Publishing, Inc. 4
  5. 5. 1.1 Just What Is a Computer? © Paradigm Publishing, Inc. 5
  6. 6. The Definition of a Computer• An electronic, programmable device.• Categories – Analog computers. – Digital computers. – Computers for communicating. © Paradigm Publishing, Inc. 6
  7. 7. • computer• analog computer• digital computer Terms to Know © Paradigm Publishing, Inc. 7
  8. 8. 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
  9. 9. 1.2 Computers in All Shapes and Sizes © Paradigm Publishing, Inc. 9
  10. 10. 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
  11. 11. Types of Computers• Supercomputer• Desktop• Laptop• Tablet PC• Netbook © Paradigm Publishing, Inc. 11
  12. 12. Will Computers Help Us Live Forever?• What is meant by exponential technological change?• What could stop the technological singularity from happening?• What are the implications of computers developing intelligence that exceeds human intelligence? © Paradigm Publishing, Inc. 12
  13. 13. Convergence of Computing Devices• Technological convergence.• Convergence devices.• Role of accessing services online. © Paradigm Publishing, Inc. 13
  14. 14. • supercomputer• petaflop• computer cluster• render farm• desktop computer• laptop Terms to Know © Paradigm Publishing, Inc. 14
  15. 15. • Tablet PC• netbook• technological convergence• convergence device Terms to Know © Paradigm Publishing, Inc. 15
  16. 16. Ask Yourself…What factor(s) differentiates a netbook from alaptop? a. size b. weight c. lack of optical drive d. All of the above © Paradigm Publishing, Inc. 16
  17. 17. 1.3 Who Is UsingComputers and How?© Paradigm Publishing, Inc. 17
  18. 18. Computers in Various Settings • Business, home, education, law enforcement, arts, medicine, entertainment. • Unique uses. © Paradigm Publishing, Inc. 18
  19. 19. Computing Careers• Computer engineering (CE)• Computer science (CS)• Information systems (IS)• Information technology (IT)• Software engineering (SE) © Paradigm Publishing, Inc. 19
  20. 20. Preparing for Computing Careers• Analytical subjects.• Associates degree with CS or IT focus.• Professional certifications. © Paradigm Publishing, Inc. 20
  21. 21. • ubiquitous computing• computer engineering• computer science• information systems Terms to Know © Paradigm Publishing, Inc. 21
  22. 22. • information technology• software engineering• webmaster• Internet law• web designer Terms to Know © Paradigm Publishing, Inc. 22
  23. 23. Ask Yourself…Which computer career involves writingsoftware programs? a. information technology b. software engineering c. computer science d. None of the above © Paradigm Publishing, Inc. 23
  24. 24. 1.4 What Is Information Technology? © Paradigm Publishing, Inc. 24
  25. 25. Information Technology• Involves – Computer-based information systems. – Software applications and computer hardware.• Relationship to computer users. © Paradigm Publishing, Inc. 25
  26. 26. Computer-assisted translation software (CAT)Playing It Safe ─ Customized dictionaries. ─ Memory programs store phrases. © Paradigm Publishing, Inc. 26
  27. 27. 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
  28. 28. Information Processing Cycle © Paradigm Publishing, Inc. 28
  29. 29. Input • Many ways to input. • Binary system. • Bits and bytes.© Paradigm Publishing, Inc. 29
  30. 30. 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
  31. 31. Cache Memory and Processing Time © Paradigm Publishing, Inc. 31
  32. 32. Output • Information resulting from processing. • Includes monitor display, printed copy, sound through a speaker, and more.© Paradigm Publishing, Inc. 32
  33. 33. Storage • Permanent storage. • Storage capacity measurement. • Storage devices include hard disk, DVD, USB flash, and external drive.© Paradigm Publishing, Inc. 33
  34. 34. Back It Up!• Back up regularly.• Some jobs require that backups be kept. © Paradigm Publishing, Inc. 34
  35. 35. • data• information• information processing cycle• binary system• bit• byte• input Terms to Know © Paradigm Publishing, Inc. 35
  36. 36. • central processing unit• processing• microprocessor• computer memory• random access memory (RAM)• cache memory• output• resolution Terms to Know © Paradigm Publishing, Inc. 36
  37. 37. • pixel• storage• file• DRAM• SRAM• SDRAM• machine cycle• instruction register Terms to Know © Paradigm Publishing, Inc. 37
  38. 38. Ask Yourself…One stage not part of the information processingcycle is a. input. b. output. c. computing. d. processing. © Paradigm Publishing, Inc. 38
  39. 39. Our Digital World© Paradigm Publishing, Inc. 39