Preparing to Purchase a Computer - Home - Boone County Schools

Lesson 6 Classifying and Evaluating Computers Computer Literacy BASICS: A Comprehensive Guide to IC3, 5th Edition 1 Morrison / Wells / Ruffolo Objectives Lesson 6 2 Identify types of personal computers. Describe desktop computers. Compare laptops and tablets.

Evaluate smartphones. Describe embedded computers. Describe servers and other large computers. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Words to Know all-in-one desktop convertible tablet desktop computer e-book reader electronic paper display embedded computer enterprise server Lesson 6

3 Morrison / Wells / Ruffolo file server handheld game device laptop computer mainframe computer netbook computer network adapter notebook CLB: A Comp Guide to IC3 5E Words to Know (continued) Lesson 6 4

personal computer (PC) portable media player scalability supercomputer tower ultrabook Web server Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer Lesson 6 Computers -organized into 3 categories: personal computers embedded computers (such as ATMs)

large computers (such as servers) 5 A personal computer (PC) - computing device than can perform input, processing, output, and storage activities on its own and is designed to be used by one person at a time. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer Lesson 6 The personal computer you decide to buy depends on:

how you plan to use it your budget its value. 6 Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer (continued) Lesson 6 Computer usage typically falls into the following ranges:

BasicOccasional use for visiting Web sites, exchanging email, and creating word-processing documents IntermediateFrequent use for a variety of tasks including playing games, watching videos, shopping online, and using productivity software AdvancedPerforming tasks that require the maximum amounts available in processing speed, memory usage, or storage capacity 7 Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer

(continued) The Lesson 6 quality of a computer is determined primarily by the performance of its system components. 8 Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer (continued) Lesson 6

9 Desktop Computers A desktop computer is a computer that fits on or next to a desk. The system unit containing the processing components is called a tower. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer (continued) Lesson 6

10 Desktop Computers (continued) An all-in-one desktop houses the processing components in the same case that holds the monitor; there is no tower. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer (continued) Lesson 6 11 Laptop Computers

A laptop computer (sometimes called a notebook) is a lightweight mobile computer about the size of a paper notebook that includes the system components, keyboard, pointing device, and display screen in a single unit. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer (continued) Laptop Computers (continued) Lesson 6 Netbook computers (also called ultrabooks) look like laptops but are smaller and lighter. Netbook computers have

12 less power and storage capacity, lack a CD/DVD drive provide a smaller keyboard and display screen than laptops include batteries that hold a charge longer. suitable for mobile users who access the Internet frequently or for long periods of time and dont need to store a lot of data or software on a hard drive. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E

Preparing to Purchase a Computer (continued) Lesson 6 Tablet Computers 13 a one-piece handheld computer that typically includes a touchscreen. True tablets use a slate design; they are rigid and do not fold. Convertible tablets use a hybrid design that includes a swivel screen or removable keyboard. Morrison / Wells / Ruffolo

CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer (continued) Lesson 6 Comparing Tablets and Laptops consider 14 their:

input devices battery life storage capacity performance physical factors price your computer usage Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer (continued) Lesson 6 Comparing Tablets and Laptops (continued) Input devices

A laptop -a physical keyboard and pointing device A tablet - a slate design has a virtual keyboard & touchscreen. 15 Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer (continued) Lesson 6 Comparing

(continued) Battery life 16 Tablets and Laptops tablets can run on battery power much longer than laptops. Storage capacitytablets offer limited storage capacities. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer

(continued) Lesson 6 17 Comparing Tablets and Laptops (continued) Performance Most tablets (use low-power dual-core processors) their performance lags behind that of a laptop. Physical factors - Tablets are smaller than laptops - weigh less Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer (continued) Lesson 6

18 Comparing Tablets and Laptops (continued) Price Tablets-more expensive Laptops are the best value; they provide better components at a lower price. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer (continued) Lesson 6 19 Computer usage - Laptops are well-suited to productivity tasks

- Tablets are ideal for consumption tasks Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer (continued) Lesson 6 20 Smartphones cell phone that includes many features of a computer connect wirelessly to the Internet include built-in cameras, music players, and global positioning systems (GPSs) send and receive phone calls, e-mail, messages, and text messages.

Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer (continued) Lesson 6 Evaluating Smartphones use the same set of criteria used to compare laptops and tabletsinput devices, battery life, storage capacity, performance, physical factors, price, and computer usage. 21 Input devicesphysical are small, and designed for

typing short phrases used in Internet search text and electronic messages. Touchscreens are more common and easier to use. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer (continued) Lesson 6 Evaluating Smartphones (continued) 22

Battery lifevaries significantly depending on your activities. Accessing the Internet uses more battery power than having a phone conversation Storage capacitySimilar to tablets--capacities of 16 to 64 GB smartphones from some manufacturers include slots for microSD cards that can hold up to 64 GB of data. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer (continued) Lesson 6 Evaluating Smartphones (continued)

23 Performance pack a lot of processing power with most models boasting multicore processors and 2 GB of RAM. Physical factorsare lightweight, about 4 to 6 oz. To compensate for small screens, smartphones increase the screen resolution. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer (continued) Evaluating Smartphones (continued) Lesson 6 24 Price

Prices for smartphones have been falling recently, with an average price of around $300 expected in 2017. Computer usage If you use a computer only to access the Internet and communicate with others, a smartphone might be the only computer device you need. If you need to use more productive or full-featured software, purchase a smartphone as a supplement to another personal computer. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer (continued) Other Mobile Devices Lesson 6 25

Mobile devices besides laptops, tablets, and smartphones include electronic book (e-book) readers portable media players handheld game devices. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer (continued) Other Mobile Devices (continued) Lesson 6 Each of these devices is dedicated to a particular purpose, and only lets you perform tasks

related to that purpose. 26 E-book readersYou use an e-book reader (also called an e-reader) to download and read electronic versions of printed books, magazines, and newspapers. E-book readers use electronic paper displays, which consume less power and provide higher contrast in bright lighting than LCDs. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Preparing to Purchase a Computer (continued) Other Mobile Devices (continued) Lesson 6

27 Portable media playersA portable media player is a mobile device that can store digital media such as songs, videos, and photos, typically on a small hard drive. Portable media players are also called MP3 players, a term that refers to the MP3 file format used for many digital audio files. Handheld game deviceA handheld game device is a mobile device for a single video game player to use one at a time. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Understanding Embedded

Computers An Lesson 6 28 embedded computer - a processor built into a household appliance or other device such as an ATM, navigation system, refrigerator, television, or other consumer electronics. The appeal and strength of an embedded computer are that it adds computing power to a device without needing intervention from a user. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Understanding Embedded Computers (continued)

Features Lesson 6 29 such as your car sensing when it moves out of its lane or when a person or an object is blocking your path as you back up are controlled by embedded computers. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Understanding Servers and Other Large Computers Lesson 6 30

Servers, mainframes, and supercomputers are large computers because they are designed for use by more than one person, up to tens of thousands of people in many cases. Large computers need much more processing, power, and storage than personal computers. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Understanding Servers and Other Large Computers (continued) Lesson 6 31 Servers

dedicated to handling data with minimal user interaction. do not include optical storage devices, speakers, high-end graphic displays, or other peripherals. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Understanding Servers and Other Large Computers (continued) Lesson 6 32 Servers (continued) usually dedicated to a single type of task.

A Web server handles the exchange of information across the Internet. enterprise servers (used by arge corporations) provide employees access to special software used to run the companys business. file servers (used by smaller businesses) to share files and programs among employees. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Understanding Servers and Other Large Computers (continued) Lesson 6 33 Mainframes A mainframe computer is a powerful computer

designed for processing huge amounts of data for hundreds or thousands of users at the same time. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Understanding Servers and Other Large Computers (continued) Lesson 6 34 Mainframes (continued) larger and more expensive than servers are typically located in climate-controlled

secure data centers to keep the processing components cool and the data safe. designed to handle extremely large volumes of data on their own Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Understanding Servers and Other Large Computers (continued) Mainframes Lesson 6 35 (continued) Large organizations rely on mainframes to process and store records of data that are too large for other computers. more expensive than servers, starting at around $75,000

for a mainframe computer compared to $500 for a server. Most can run without interruption for decades, which is why they are worth the investment to large organizations. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Understanding Servers and Other Large Computers (continued) Lesson 6 36 Supercomputers very powerful computers distinguished by its processing capacity, especially its speed of

calculation. have processors with a million or more cores used primarily for scientific applications that need to perform complex calculations very rapidly Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Summary In this lesson, you learned: Lesson 6 37 Morrison / Wells / Ruffolo

A personal computer is a computing device that can perform input, processing, output, and storage activities on its own and is designed to be used by one person at a time. The personal computer you decide to buy depends on how you plan to use it, your budget, and its value, which is the quality of the computers features, construction, and components compared to the price. CLB: A Comp Guide to IC3 5E Summary (continued) Lesson 6 38 Computer use can be basic, intermediate, or advanced. Basic usage involves occasionally visiting Web pages and creating word-processing documents. Intermediate usage involves more

frequent work on the computer to access the Internet and productivity software. Advanced usage involves tasks that require the maximum or near the maximum amounts available in processing speed, memory usage, or storage capacity. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Summary (continued) The quality of a computer is determined primarily by the performance of its system components, including the capacities and speeds of the processor, RAM, and storage devices. When considering a personal computer to purchase, you can select from four major types: desktop computers, laptops, tablets, and smartphones.

Lesson 6 39 Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Summary (continued) Lesson 6 40 A desktop computer fits on or next to a desk, is designed to be stationary, and runs on power from a wall outlet. With a traditional desktop computer, the system unit, monitor, keyboard, and pointing devices are separate pieces of equipment. The computer case containing the

processing components is called a tower. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Summary (continued) A recently developed type of desktop computer is called an all-in-one desktop, which houses the processing components in the same case that holds the screen, not in a tower. Traditional desktop computers are preferred by computer enthusiasts who plan to upgrade their systems. People who want a desktop computer but lack enough physical space can consider an all-in-one desktop, which is more compact than a traditional desktop computer, can be moved more easily, often includes a touchscreen, and has a sleek, attractive style. Lesson 6

41 Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Summary (continued) Lesson 6 42 A laptop computer (sometimes called a notebook) is a lightweight mobile computer about the size of a paper notebook that includes the system components, keyboard, pointing device, and display monitor in a single unit. Morrison / Wells / Ruffolo

CLB: A Comp Guide to IC3 5E Summary (continued) Lesson 6 43 Todays laptops have as much computing power and perform as well as most desktop computers because laptops can include top-notch processors and large amounts of RAM and hard disk storage capacity. However, because it costs more to produce components that fit a laptops compact design, laptops are slightly more expensive than desktop computers with the same power, speed, and storage capacity. Morrison / Wells / Ruffolo

CLB: A Comp Guide to IC3 5E Summary (continued) Lesson 6 44 Netbook computers (also called ultrabooks) look like laptops but are smaller and lighter, have less power and storage capacity, lack a CD/DVD drive, and provide a smaller keyboard and display screen, but include batteries that hold a charge longer. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E

Summary (continued) Lesson 6 45 Like laptops, tablets run on battery power and can be plugged into a wall outlet as necessary. True tablets use a slate design; they are rigid and do not fold. Convertible tablets use a hybrid design that includes a swivel screen or removable keyboard so you can use the computer as a laptop or tablet. Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Summary (continued) To compare tablets and laptops in general,

consider their input devices, battery life, storage capacity, physical factors, and price as well as your computer usage. Smartphones connect wirelessly to the Internet; include built-in cameras, music players, and global positioning systems; and let you send and receive phone calls, e-mail messages, and text messages. Lesson 6 46 Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Summary (continued) To evaluate smartphones, you can use the same set of criteria for comparing laptops and tablets:

input devices, battery life, storage capacity, performance, physical factors, price, and computer usage. Mobile devices besides laptops, tablets, and smartphones include electronic book (e-book) readers, portable media players, and handheld game devices. Lesson 6 47 Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Summary (continued) An embedded computer is a processor built into a household appliance or other device. Its appeal and strength are that it adds computing power to a device

without needing intervention from a user. Servers, mainframes, and supercomputers are large computers because they are designed for use by up to tens of thousands of people in many cases. To support that many users, large computers need much more processing power, memory, and storage capacity than personal computers. Lesson 6 48 Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Summary (continued) Servers are dedicated to handling data with minimal user interaction. Most include system components onlyno monitor, keyboard, or other peripherals. Types of servers

include Web servers, enterprise servers, and file servers. A basic server can have processing, memory, and storage capabilities similar to a powerful desktop computer. As the number of server users increases, servers must be able to increase their processing capacity to handle the additional data, a feature called scalability. Lesson 6 49 Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E Summary (continued) A mainframe computer is a powerful computer that is larger and more expensive than a server and is designed for processing huge amounts of

data with stability, reliability, and accuracy. To be classified as a supercomputer, a computer must be one of the fastest computers in the world. Supercomputers are used primarily for scientific applications that need to perform complex calculations very rapidly. Lesson 6 50 Morrison / Wells / Ruffolo CLB: A Comp Guide to IC3 5E

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