Download - Cyber revoluion
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What’s it ?
▪ Cyber - related to computer
▪ Revolution - sudden or abrupt change
Cyber revolution:
Sudden change in the field of computers.
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VANISHING BORDERS IN CYBERSPACE
3
• In Cyberspace territorial boundaries are
meaningless • Internet address has no relation to the physical
location of the computer or its user
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History of Evolution Of Computers
Two Eras:
▪ Mechanical Era (Before 1945)
▪ Electronic Era (1945 - )
Can be divided into generations
▪ First Generation (1945 – 1954)
▪ Second Generation (1955 – 1964)
▪ Third Generation (1965 – 1974)
▪ Fourth Generation (1975 - today)
▪ Fifth generation (towards artificial intelligence)
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Evolution of Computers
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History of Computers - Long, Long Ago
▪ beads on rods to count and calculate
▪ still widely used in Asia!
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History of Computers - Way Back When
• Slide Rule 1630
• based on Napier’s rules for logarithms
• used until 1970s
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IBM PC - 1981
▪ IBM-Intel-Microsoft joint venture
▪ First wide-selling personal computer used in business
▪ 8088 Microchip - 29,000 transistors – 4.77 Mhz processing speed
▪ 256 K RAM (Random Access Memory) standard
▪ One or two floppy disk drives
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Apple Computers
▪ Founded 1977
▪ Apple II released 1977 – widely used in schools
▪ Macintosh (left) – released in 1984, Motorola 68000
Microchip processor – first commercial computer with
graphical user interface (GUI) and pointing device (mouse)
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SUPER COMPUTERS ▪ 1000 Trillion calculations per seconds (PETAFLOPS)
Tianhe-2 - 33.86 PFs ( CHINA)
▪ FLOPS – FLOating Point operation Per Second
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A Computer System
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Advantages of Using Computers
▪ Speed: Computers can carry out instructions in less than a millionth of a second.
▪ Accuracy : Computers can do the calculations without errors and very accurately.
▪ Diligence : Computers are capable of performing any task given to them repetitively.
▪ Storage Capacity : Computers can store large volume of data and information on magnetic media.
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What is OPERATING SYSTEM?
Acts as an interface between Humanbeing and Computer
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Types of Computers
On the basis of Computing Power & Size:
▪ Laptop / Palmtop
▪ Micro Computer / Desktop
▪ Mini Computer / Mainframe
▪ Super Computer
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Modern Computer has
▪ Input ------ Keyboard, mouse, touchpad
▪ Output------ Monitor, speakers
▪ High operating speed
▪ Compact size
▪ User-friendly
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What these components do
▪ Power Supply – (heart) supplies power to all the circuitry and devices.
▪ Motherboard – (body) acts as a manager for everything on the computer – connects all the other components together.
▪ CPU – Central Processing Unit – (brain) this does all the work of computing.
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Examining the parts of Computer
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MOTHERBOARD
6/9/2014
MAIN PRINTED CIRCUIT BOARD OF COMPUTER
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RAM - RANDOM ACCESS MEMORY
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HARD DISK:
• Non sequential • Secondary Storage • Huge memory storage
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RIBBON CABLES:
polarized
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Video Card - For better rendering
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Sound Card
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How it became popular?
▪ Graphic User Interface ( GUI )
▪ Compact and user-friendly
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HENCE PROVED!
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Digital Revolution Internet Infra in INDIA
27
4.8 Mil. High Speed Internet
65 Mil. Internet Users
248 Mil. Mobile Phones
8 Mil. Mobile Phones being added per month
Internet
BSNL
Bharti
TATA Communications
Reliance
ERNET
Mail Servers
1Mil. Domains (0.5 Mil. “.in”)
DNS
130+ IDCs 134 Major
ISPs
`
VOIP, IPTV
NIC
INDIA Internet Infrastructure:2008.5
Govt.
Academia
Enterprise
Home
Tele Density 24 per 1000 person
IT / ITES BPO
Targetted Broadband connection = 10 Mil. (2010)
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Other side
Cyber crime
▪ Hacking
▪ Creating and spreading virus
▪ and so on…
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Think before you Click
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Good road with bad drivers
A So Good Friend and a very bad enemy !
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Issues
▪ Internet became popular day by day ▪ People started to Harness the power of Internet for
commercial purpose ▪ What Hacker does? – Inorder to raise the traffic hit of a particular
website, they write code for that. – How to separate computer and Human
in Brainless resourceful Internet ???? – Answer in next slide !!!!
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Know Something
CAPTCHA
Completely Automated Public Turing test to tell Computers and Humans Apart
Prove that you are not a robot
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Why we go for QWERTY?
To share all letters with all fingers and to attain easy fast typing Commonly used letters in middle row, ready to our fingers Rare letters are in corners, far from our fingers.
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And Finally it’s my turn to
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QUESTIONS ? Post ur Qs to [email protected]