Computer Generations
• How many generations of computer?
• What are these
First Generation
1946-1959. Vacuum tube based
Harvard Mark I - The first modern
digital computer (1942)
Second Generation
1954-1965. Using transistor
The SAGE Computer Network
(about 1954)
Third Generation
1965-1971. use of Integrated
Circuits (IC's)
Apollo Guidance Computer (1968)
Forth Generation
1971-1980. Very Large use of Integrated Circuits (IC's)
Apple I (1976)
Fifth Generation
1980-till date. Ultra Large Scale Integration
The Apple Macintosh (1984)
Dynacam - the first digital camera (1990)
• The first consumer
digital camera. Saved a
320 x 240 pixel image,
interfaced to an Apple
Computer Hardware
Computer Hardware
Central Processing Unit (CPU)
Brain of Computer
IT Process all input data and provides output
to hardware
CPU speed measured in Gigahertz (GHz)
1 Gigahertz (GHz) = 1000,000,000 cycles per
More higher CPU speed is more higher
Computer Hardware
Computer Hardware
RAM (Random Access Memory)
Computer Hardware
Hard Disk Drive (HDD)
Operating System (OS)
1975–1981: Microsoft boots up-History of Windows OS
What is the First Window of Microsoft?
1985: Introducing Windows 1.0
1990-Windows 3
1995: Windows 95—the PC comes of age (and don't forget the Internet)
1998: Windows 98
1999: Windows Me
2000: Windows 2000 Professional
2001–2005: Windows XP—Stable, usable, and fast
2006–2008: Windows Vista—Smart on security
2009: Windows 7 introduces Windows Touch
2012: Windows 8 features apps and tiles
2013: Windows 8.1 expands the Windows 8 vision
Computer Memory Measurement
0 or 1 the Smallest Unit
8 Bits
1 Byte
1024 Bytes
1 Kilobyte (K.B)
1024 Kilobyte (K.B)
1 Megabyte
1024 Mega Byte
1 Gigabyte
1024 Gigabyte
1 Terabyte
1024 Terabyte
1 Exabyte
Yahoo Old Days
What’s Next?
Flexible Mobiles
Google Glasses
Google Facebook Drone

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