Tuesday, August 25, 2015
Computer Crimes:
Computer Virus:
Types of Computer Crimes:
V- vital
Virus:
Types of Virus:
2. Boot Virus- infects the boot sector of a floppy or hard disk.
3. Overwrite Virus- replaces file contents.
4. Macro Virus- causes repeating start up
5. Directory Virus- change he path that indicates fill location.
- directly affects the master program or as of a computer.
COMPUTER HARDWARES
Central Processing Unit
•It is like a super calculator of a computer.Hard Disk
·It acts as the permanent data storage of the computer unlike the memory card it can store data even if you reformat the computer.
Mouse
·It allows you to move the cursor on the screen wherever you want to.
Mother Board
·It is the electronic exoskeleton of the computer and its connected to all parts of the computer.
Input/Output Ports
·It allows you to connect by devices to the computer.It has USB, Audio Ports, etc.
Cooling System(Fan)
·Helps your personal computer on Cooling Down most of the cooling system are fans.
Optical Drive
·Also known as DVD Drive it allows you to insert any read only memories like CDs and DVDs.
Monitor (Output Device)
·It allows you to see what you are doing in the computer.
Expansion Card
·Upgradable cards like graphic cards, network adapter,sound cards,etc.
Keyboard
·It allows you to type any word to the computer it has numerical and alphabetical buttons.
System Unit
·It contains the whole mother board together and it also has the wiring inside the computer.
Printer
·It allows you to turn a soft copy into a hard copy.
Tuesday, July 28, 2015
The Five Generations of Computer
First Generation Computers(1940-1956)
♛Vacuum tubes for circuitry and magnetic drums.
♛Using a great deal of electricity.
♛Generated a lot of heat.
♛UNIVAC & ENIAC
Second Generation Computers(1956-1963)
♛Transistors replaced vacuum tubes.
♛High-level programming languages
(COBOL,FORTRAN)
♛Symbolic language.
♛Stored their instructions in their memory.
Third Generation Computers(1964-1971)
♛Silicon Chips
♛Semiconductors
♛Keyboards,Monitor,interfaced with operating system.
♛Run many different applications at one time.
Fourth Generation Computers(1971-present)
♛Microprocessor
♛Intel 4004 chip
♛Central Processing Unit
♛GUIs, mouse handheld devices
♛Thousands of circuits were build onto a single silicon chip.
Fifth Generation Computers
♛AI(Artificial Intelligence)
♛Voice recognition
♛Parallel processing
♛Natural language
♛Robotics
♛Capable pf learning and self-organization.
I've learned that the Generation of Computers will keep on upgrading and upgrading.
Wednesday, July 22, 2015
he History of Computing
•1623-1662: Blaise Pascal is a French mathematician and a philosopher,he invented the Pascaline in 1642.
•1642: The Pascaline is a single revolution of one wheel would engage gears that turned the wheel one tenth of a revolution to its left.
•1801:Jacquard's Loom(Frenchman Joseph Marie Jacquard(1753-1871)).This is the first significant use of binary automation.
•1793-1871:Charles Babbage envisioned a steam-powered difference engine and then an analytical engine.
•1816-1852:Lady Ada Augusta punched cards could be prepared to instruct Babbage's engine to repeat certain options,she is the first programmer.
•1860-1929:Herman Hollerith denoised a punched-card tabulating machine to speed up the 1890 U.S. census.
•1890:Hollerith's Tabulating Machine used a hand punch to enter data onto cards.
•1874-1956:Thomas Watson Sr. in 1896 Herman Hollerith founded the Sabulating Machine Company. International Business Machine Corporation(IBM)by company president Thomas J. Watson in 1924.
•1920-1950:The Electro-Mechanical Accounting Machine Era a punched-card technology
•1903-1995: Dr.John V. Atanasoff and his ABC(Atanasoff Berry Computer)this is the first electronic digital computer;The ABC.
•1946:The Electronic ENIAC computer(Dr.John W. Mauchly, Presper Eckert Jr.)used vacuum tubes.
•1951:The UNIVAC 1 the first generation of computer.The first commercially variable elctronic digital computer.
•1954:The IBM 650 introduced in 1954,was designed as a logical upgrade to existing punched-card machine.
•1907-1992:"Amazing" Grace Murray Hopper found the first "bug" in a computer-a real one.
•1958:The First Integrated Circuit is a phase-shift oscillator, was invented in 1958 by Jack S. Kilby of Texas Instruments.
•1963:The PDP-8 Minicomputer is the first successful minicomputer by Digital Equipment Corporation.
•1964:The IBM System/360 and The Third Generation of Computers the third generation was characterized by computers built around integrated circuits.
•1964:Basic-More Than a Beginner's Programming Language Dr. Thomas Kurtz and Dr.John of Dartmouth College developed a programming language that a beginner could learn and use quickly.
•1969: APRANET and Unbindling of Hardware and Software a V.S. Department of Defense's Advanced Research Project Agency(ARPA) sponsorship of a project named ARPANET.
•1975:Microsoft and Bill Gates, Bill Gates and Paul Allen formed Microsoft Corporation.
•1976:The Apple 1 Steve Jobs and Steve Wozniak along with Ronald G. Wayne formed the Apple computer Company.
•1981:The IBM PC, IBM tossed its hat into the personal computer ring its announcement of the IBM Personal Computer.
•1982:Mitchell Kapor Designs Lotus 1-2-3, in 1982, Kapor founded lotus Development Company.
•1984:The Macintosh and Graphical User Interfaces, Apple computer introduced the Macintosh desktops computer with a very friendly Graphical User Interfaces.
•1985-Present:Microsoft Windows Microsoft introduced Windows, a GUI for IBM PC-compatible computer in 1985.
•1989:The World Wide Web Berners-Lee and a small team of scientists convinced HTML (the language of the internet), URLs(Internet Addresses), and put up the first server supporting the new world wide web format.
•1993:The Internet Browser, the development in 1993 of the graphical browser mosaic Marc Andersen and his team.
•1996:The Hand Held Computer, the Palm Pilot hand held computer was introduced by Palm Computing Inc.
As a student I learned that the history of computing is updating and updating into a better ones.
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