Introduction to Computers

Chapter 1 - Introduction to Computer Objectives Learn Basic Computer Terminology Differentiate Between Hardware and Software Understanding Computer Components Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer In the beginning… Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer What is a computer? An electronic device, operating under the control of instructions (software) stored in its own memory unit, that can accept data (input), manipulate data (process), and produce information (output) from the processing To describe a collection of devices that function together as a system Chapter 1 - Introduction to Computer

Different Types of Computers Desktop Lap Top Hand Held Chapter 1 - Introduction to Computer

Devices that comprise a computer system Speaker (output) Monitor (output) “THE BOX” Printer (output) Scanner (input) Storage devices (CD-RW, Floppy, Hard disk, zip,…) Keyboard (input) Mouse (input) Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer Inside “THE BOX”… Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer Motherboard This is where most of the electronics is located Chapter 1 - Introduction to Computer

Central Processing Unit (CPU) Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer Brains of a computer Contains electronic circuits that cause processing to occur Interprets instructions to the computer, performs the logical and arithmetic processing operations, and causes the input and output operations to occur Chapter 1 - Introduction to Computer

Modem (Modulator Demodulator) Use for internet access with phone line Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer Audio Card This is the voice of your system Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer Network Card Used to connect to high speed internet access e.g. Cable or DSL lines Chapter 1 - Introduction to Computer

Single Inline Memory Module (SIMM) Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer Hard Disk Drive (HDD) Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer Hard Disk Drive Computers main, long term storage. It is referred to as non-volatile storage, because it does not disappear when the power is turned off. The size of the Hard Drive is measured in Gigabytes. (Billions of Bytes). Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer Power Supply 250 – 500 Watts This is the power source that makes everything go Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer What Does A Computer Do? Computers can perform four general operations, which comprise the information processing cycle. Input Process Output Storage Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer Computer Tools Two kinds: Hardware Physical parts to computer (can be touched) Software The programs that are on the disks Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer Examples of Hardware Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer Computer Storage Two main types: Memory Data Storage Chapter 1 - Introduction to Computer

Random Access Memory (RAM) RAM is the memory used by the computer to run programs. The amount of RAM available will run and how many windows can be open at one time. Volatile Disappears is turned off Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer Data Storage Information stored away for use later on (like food in the refrigerator) Usually long-term (safer) May be stored on disks, CDs. DVDs, or flash drives Chapter 1 - Introduction to Computer

Measuring Information Bytes One character takes up about one Byte. An email takes up a few (thousand bytes) Kilobytes (thousands of bytes) A picture may take up Megabytes (millions of bytes) All the information on a computer may run into Gigabytes (billions of bytes) Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer Storage Examples Email, about a thousand characters Picture of granddaughter, about half a megabyte Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer Floppy Disk Portable, inexpensive storage medium that consists of a thin, circular, flexible plastic disk with a magnetic coating enclosed in a square-shaped plastic shell Main disk used for library users Holds 1.44 Megabytes 1,440,000 Bytes Feels hard Floppy part inside cover Almost obsolete Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer Zip Disk Similar to floppy Thicker form Holds more information Available on some library computers Also becoming obsolete Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer Compact Disks Also called an optical disc, is a flat round, portable storage medium that is usually 4.75 inch in diameter. A CD-ROM (read only memory) Used the same laser technology as audio CDs for recording music. Can contain other types of data such as text, graphics, and video. The capacity is 650 MB of data. Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer DVD Replacing CD-ROM Holds much larger amount of information (such as movie) Also does not work on library computers Chapter 1 - Introduction to Computer

Chapter 1 - Introduction to Computer Flash Drive Most recent widely used storage system Very portable, often worn like jewelry 128-512 Megabytes most common sizes Chapter 1 - Introduction to Computer

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