Succeeding with Technology

Chapter 2

Hardware Designed to Meet the Need

The Digital Revolution Integrated Circuits and Processing Storage Input, Output, and Expansion Selecting and Purchasing a

Computer

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2.3

Storage

• Read-only Memory• Magnetic Storage• Optical Storage• CD-ROM

• DVD• CD-RW • Solid State Storage• Flash memory card• USB

Key Terms

From CH1: Storage is the ability to maintain data within the system temporarily or permanently

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System Storage Random Access Memory, RAM, or primary

storage: Volatile memory that stores currently running

software: OS and apps, and data in addressed cells.

512 MB Standard, 1 GB recommended RAM SIMM or DIMM: Single or Dual In-line

Memory Modules are inserted in slots in the Motherboard

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Memory Hierarchy

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Other Types of Memory Cache Memory is fast access storage on the

processor Graphics Memory is included on graphics

card for faster video display ROM stores the boot process instruction

that start the computer and load the OS from hard drive into RAM

CMOS memory provides semipermenant storage for system configuration information that may change.

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Graphics Card Today’s high-end graphics

cards are computers unto themselves that include a Graphics Processing Unit (GPU) and hundreds of MB of graphics memory.

PCI Express vs AGP Dedicated, integrated,

hybrid

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Secondary Storage

Storage Methods Sequential Access

(tape) Direct Access (disk

or solid state)

Storage Methods Sequential Access

(tape) Direct Access (disk

or solid state)

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Storage Media Type Magnetic storage devices use the magnetic

properties of iron oxide particles to store bits and bytes more permanently than RAM.

Optical storage media, such as CDs and DVDs store bits using an optical laser to burn pits into the surface of a highly reflective disk surface.

Solid State storage devices use flash memory to store bits.

Tape Drive

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Mini Memory Card

1 TB HDD Recorder

Secondary Storage

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Tape Drive

Storage silo robot

2GB MP3 Player

Secondary storage is used to store data more permanently without the need for electricity.

DVD-RW

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Microdrives from Toshiba provide iPods with their

ultra high storage capacity.

Magnetic Media

Hard Disk Drives Magnetic Tape High-capacity Disks (Zip, etc) Floppy Disks (outdated) Microdrives

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Optical Media

CD, DVD, Blu-laser Disk (BD)

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Solid State

A flash memory card is a chip that, unlike RAM, is nonvolatile and keeps its memory without the need for electricity.

USB Flash Drives use flash memory to provide high capacity storage through the USB port.

Universal Serial Bus or USB is a standard that allows a wide variety of devices to connect to a computer through a common port.

Universal Serial Bus or USB is a standard that allows a wide variety of devices to connect to a computer through a common port.

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Internet Storage

Users are increasingly storing data on Web servers, rather than on PCs through services provided by companies like Yahoo, MSN, Google and others. Google offers Web-based Email,

Calendar, Photo, Spreadsheet, and Word Processing services that provide the software and substantial online storage for free.

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Storage Criteria

Choose storage media by the Cost per MB Capacity Portability Durability Security Accessibility

as associated with the requirements of the data and usage

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RAMCPU

Registers

cacheROM

VRAM

Hard Drive

Tape

Magnetic Storage

CD

DVD

Optical Storage

USB

network

Storage Review

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2.4

Input, Output, and Expansion

• Input device• Output device• Touch screen• Game controller

• Display resolution• LCD

Key Terms

Read on your own

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2.5

Selecting and Purchasing a Computer

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Strategies for Computer Shopping

Choose type: notebook, desktop, tablet, handheld

Choose platform Windows/Mac/Linux Palm/WindowsMobile

Choose Manufacturer Choose Model Select Add-ons

The all-important Warranty

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Helpful Links for Computer Shopping Research

www.zdnet.com www.cnet.com www.macworld.com

Computer Retailers www.cdw.com www.compusa.com

Direct from Manufacturer www.apple.com www.dell.com www.sony.com www.hp.com www.gateway.com www.toshiba.com

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Chapter 2 Questions?

Don’t forget to turn your phone on!!