Presentation on theme: "Introduction to Computer Technology"— Presentation transcript:
1 Introduction to Computer Technology 1. Computer DefinitionComputer is an electronic machine operating under the control of instructions stored in its memory unit that can:- accept data (inputs)process data arithmetically and logicallyproduce results (outputs)
2 2. DataData is a collection of unorganized facts, which include words, numbers, images, and sounds. Computers process data to create information.3. InformationInformation is data that is organized, has meaning and is useful.Example: reports, newsletters, a receipt, a picture, an invoice or a check.
3 4. Terms of computer technology Input – the data entered into a computer.Output – the processed results.Storage – a place whereas a computer hold data and information for future use.User - a person that communicate with a computer or uses the information it generates.Hardware – the electrical, electronic and mechanical equipment that makes up a computerSoftware – is the series of instruction that tells the hardware how to perform tasks.
4 Computer Evolution 1. First Generation (1939-1954) - vacuum tube Atanasoff-Berry Computer 1939, from IEEE1. First Generation ( ) - vacuum tube• John V. Atanasoff designed the first digital electroniccomputer• Atanasoff and Clifford Berry demonstrate in Nov. the ABCprototype• Konrad Zuse in Germany developed in secret the Z3• In Britain, the Colossus was designed in secret at BletchleyPark to decode German messages• Howard Aiken developed the Harvard Mark I mechanicalcomputer for the Navy• John W. Mauchly and J. Presper Eckert built ENIAC at U ofPA for the U.S. Army Atanasoff-Berry Computer 1939,from IEEE
5 2.Second Generation Computers (1954 -1959) – transistor "First transistor (model), December Constructed byJohn Bardeen, Walter Brattain and William Shockley at BellLaboratories," from Smithsonian NMAH2.Second Generation Computers ( ) – transistor• National Bureau of Standards (NBS) introduced its StandardsEastern Automatic Computer (SEAC) with 10,000 newly developedgermanium diodes in its logic circuits, and the first magnetic diskdrive designed by Jacob Rabinow• Tom Watson, Jr., led IBM to introduce the model 604 computer, itsfirst with transistors, that became the basis of the model 608 of1957, the first solid-state computer for the commercial market.Transistors were expensive at first, cost $8 vs. $.75 for a vacuumtube. But Watson was impressed with the new transistor radiosand gave them to his engineers to study. IBM also developed the650 Magnetic Drum Calculator, the first by IBM to use magneticdrum memory rather punched cards, and began shipment of the701 scientific "Defense Calculator" that was the first of the Model700 line that dominated main frame computers for the next decade
6 3. Third Generation Computers (1959 -1971) – IC IC, from Smithsonian NMAH3. Third Generation Computers ( ) – IC• Jack Kilby of Texas Instruments patented the first integrated circuit in Feb. 1959; Kilby had made his first germanium IC in Oct. 1958; Robert Noyce at Fairchild used planar process to make connections of components within a silicon IC in early 1959; the first commercial product using IC was the hearing aid in Dec. 1963; General Instrument made LSI chip (100+components) for Hammond organs 1968
7 4. Fourth Generation (1971-Present) – microprocessor Apple I of 1976 , from SmithsonianNMAH4. Fourth Generation (1971-Present) – microprocessor• Gilbert Hyatt at Micro Computer Co. patented the microprocessor; Ted Hoff at Intel in February introduced the 4-bit 4004, a VSLI of 2300 components, for the Japanese company Busicom to create a single chip for a calculator; IBM introduced the first 8-inch "memory disk", as it was called then, or the "floppy disk" later; Hoffmann-La Roche patented the passive LCD display for calculators and watches; in November Intel announced the first microcomputer, the MCS-4; Nolan Bushnell designed the first commercial arcade video game "Computer Space“5. Fifth Generation (Present and Beyond)• World-Wide Web (WWW) was developed by Tim Berners-Leeand released by CERN.
8 Types of Computers There are four types of computers Supercomputers - the most powerful type of computer. These machines are special high capacity computers used by very large organizations.Eg. NASA uses supercomputers to track and control space explorations.Mainframe computers– need specially wired, air conditioned rooms. Not powerfully as supercomputers. Mainframe computers capable of great processing speeds and data storage.Eg. Insurance companies use mainframe to process information about millions of policy holders.
9 Minicomputers– are refrigerator-sized machines. Medium-sized companies or departments of large companies always use them for specific purposes.Eg. Production departments use minicomputers to monitor certain manufacturing processes and assembly line operations.MicrocomputersThe least powerful, yet the most widely used and fastest-growing, type of microcomputers:i) desktopii) notebookiii) tablet PCiv) handheld computers (palm computers/PDA )
10 Assignment 1 There are four types of microcomputers: Desktop Notebook Tablet PCHandheld computersQuestionExplain briefly:the definition,specification,uses,advantages and disadvantagesAnd give one example of the latest technology forEach of microcomputers.Note* Please enclosed your example within pictures/ graphic