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Explain how input devices are suited to certain kinds of data Distinguish between RAM and ROM Identify and appropriate output device for different types of data Contrast different storage devices

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Several devices that perform the 4 basic functions of computing Input Processing Output Storage

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Keyboard Mouse Trackball Touchpad Joystick Digital Cameras Scanners Microphones

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Located inside the computer and it travels from one device to another through computers motherboard.

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CPU main processing device (central processing unit) Carry fewer than 1,000 instructions Perform millions of these operations every second

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RAM primary storage, temporary storage of instructions and data using chips called random access memory ROM Read-only memory chips that contain instructions that start the computer. These instructions do not change

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Devices that display the results of the processing Computer screen Printer Speakers or headphones

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Magnetic Media : Floppy-disk, USB, Zips, REV drives USB: universal serial bus

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Flash Media : use non-magnetic storage medium called flash memory Used in digital cameras, handheld computers, and flash drives

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Optical Media: CD ROM, and DVD CD-R, CD-RW, or DVD/CD-RW used to record data onto blank disk CD-ROM, and DVD drives can only read data stored CD can store 650 megabytes or 74 mins of audio 700 megabytes or 80 mins

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Explain the Binary System Describe how software is written and translated Summarize the tasks of operating systems Identify two leading operating systems and explain why compatibility is an issue.

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Binary system: recognize two possible values Bits (pieces) values 8 bits together make a byte A byte has 256 possible values from 00000000 to 11111111

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LetterCodeNumberCode A01000001100110001 B01000010200110010 C01000011300110011 D?4?

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LetterCodeNumberCode A01000001100110001 B01000010200110010 C01000011300110011 D01000100400110100

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Step by Step Instructions (Software Language) 1. Get the number stored in a particular location in RAM 2. Get another number from another particular location 3. Add the two numbers 4. Copy the answer to another particular location in RAM

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Programmers write programs source code. Compilers translate the source code into binary form, using only 0s and 1s The result is the object code.

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Software that tells the computer how to do its work is the --- OPERATING SYSTEM Two most popular operating systems are Microsoft Windows Macintosh OS (Apple Computers)

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SUPERCOMPUTERSMAINFRAME

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MINICOMPUTERSSERVER

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WORKSTATIONSDESKTOP

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PORTABLE COMPUTERHANDHELD COMPUTER

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1. THIS PICTURE IS AN EXAMPLE OF INPUT OR OUTPUT DEVICES 2. THIS IS AN EXAMPLE OF INPUT OR OUTPUT DEVICES

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3. The 4 basic functions of computing include all the following except? A. processing B. input C. storage D. commanding 4. A camera can be an example of an input device. TRUE FALSE

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5. Which of the following device houses all the chips and circuits a computer needs in order to function? A. Table B. Motherboard C. Printer D. Storage 6. Which is also called primary storage? A. ROM B. RAM C. CPU D. DVD

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7. Which of the following is an example of a secondary storage? A. CD B. ROM C. USB D. Both A & C 8. Which is known as the language of computers? A. Byte B. RAM C. ROM D. Binary Code

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9. How many bits are needed to form a byte? A. 3 B. 7 C. 8 D. 9 10. Which is an example of a binary number? A. 10011001 B. -342 C. 67439622 D..0000002

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11. The binary code for the letter A is? A. 01000010 B. 01000001 C. 00001000 D. 00110011 12. ______ write the software and special language for computers. A. architects B. technicians C. programmers D. electricians

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13. What would you most likely use a microphone to input? A. commands B. images C. sound D. text 14. What are the two most popular operating systems? A. Word & Excel B. Microsoft Windows & Macintosh OS C. Macintosh OS & Apple D. Powerpoint and MS

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