WELCOME

1. WELCOME SIGCS I – Hardware and Software Solutions for Teachers Your presenter Taner Erig, Department of Computer Science Eastern Michigan University, Ypsilanti, MI. 48197 You may expect to Gain a more complete understanding of computers beyond general use of application programs Look at parts and components of a typical computer system Learn how information is stored and processed Cover basic concepts of operating systems and networking Discuss current topics in computing such as: Privacy Information Security Present Issues & Controversies Taner Erig - EMU

2. Computers: A First Look • What is a computer? • A computer is a device that takes data in one form, uses it, and produces a different form of information which is related to (but not the same as) the original data. • ***** It is important to recognize that computers are MORE than laptops and boxes next to monitors. Many “SINGLE PURPOSE” machines are considered computers; scale, calculator, stonehenge Taner Erig - EMU

3. The Many Kinds of Computers • Computers can be classified by three sets of characteristics: Electronic versus Mechanical General-purpose versus Special-purpose Digital versus Analog Taner Erig - EMU

4. The General-Purpose Electronic Digital Computer • The General-purpose electronic digital computer • General Purpose: Can be used in many different fields of work. • Electronic: Requires a source of electricity to function. • Digital: Made up of binary circuitry. (Each can be set to one of one two possible conditions.) • Controlled by humans: Presents results in a way usable by humans. Taner Erig - EMU

5. The General-Purpose Electronic Digital Computer • Digital computers are made up of four major components: • Input units - Humans interface with the computer through devices like the mouse and keyboard. • Memory - Stores programs and other data. • Central Processing Unit - “Brain” controls all computer operations, processes information, computes results. • Output Units - The computer displays results to the human through devices like the printer and monitor. Taner Erig - EMU

6. The General-Purpose Electronic Digital Computer • Computer Hardware • The electronics and associated mechanical parts of the computer. • Computer Software • Consists of instructions that control the hardware and cause the desired process to happen • A Floppy Disk is considered hardware. A program ON the disk is considered software! Taner Erig - EMU

7. The Many Kinds of Computers • Digital to Analog Example: Modems (translate from digital to analog and from analog to digital) Modem (translates from digital to analog and from analog to digital) “Analog” Phone lines send the information as a series of sound frequencies The Computer is Digital (moves information around within the computer in the form of voltage pulses) Taner Erig - EMU

8. List a hardware component for each line in categories below> Do you know Hardware? CPU: Processor chip INPUT: 1.___________ 2.___________ 3.___________ 4.___________ INPUT: 1.__Mouse___ 2._Keyboard__ 3.__Camera__ 4.___Scanner/Fax_ OUTPUT: 1.__Monitor_ 2.__Printer__ 3._Speakers__ 4.__Fax/Modem*_ OUTPUT: 1.___________ 2.___________ 3.___________ 4.___________ MAIN MEMORY: 1.chips&SIMMS SECONDARY MEMORY: 1.__________________ 2.______________ 3.___________ 4._______________ SECONDARY MEMORY: 1._CD Rom, DVD, etc._ 2.__ZIP, Jazz disk._ 3.__Floppy disk_ 4.__Hard disk__ Taner Erig - EMU

9. 0 0 9 1 8 2 7 3 6 4 1 5 The General-Purpose Electronic Digital Computer • Why do computers work in binary? • Given that electricity flows - or doesn’t = on OR off • Simply, because using the binary system is cheap and reliable. • Circuits can be made at the molecular level • Building computers using any other system would be too expensive and become less reliable. Taner Erig - EMU