Ch.3 Notes - Chapter 3 Click to edit Master subtitle style...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
Click to edit Master subtitle style Computer Hardware Chapter 3
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Objectives l history and evolution l microcomputer, midrange, and mainframe l input, output, and storage l system components and functions l computer systems selection To understand how computer hardware, software, data, and communication networks interact with the business process.
Background image of page 2
Pre-Computer Calculations l Counting on fingers and toes l Stone or bead abacus l 1642: first mechanical adding machine
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Early Computing l 19th Century Analytical Engine l Charles Never built due to of lack of electronics l 1880s Hollerith’s punched cards used to record census data using On/Off patterns l Later became IBM
Background image of page 4
ENIAC – 1946 First Electronic Digital Computer
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Waves of Computing l Late 1950s - Second Generation Transistors replaced vacuum tubes 200,000 to 250,000 calculations per second l 1979 Apple computer l 1982 IBM introduced the PC l Fastest selling PC (after 1982). l Donated computers to elementary schools to get more people to use them in the business world. (apple computers)
Background image of page 6
Categories of Computer Systems
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Computer Processing Speeds l Early computers Milliseconds (thousandths of a second) Microseconds (millionths of a second) l Current computers Nanoseconds (billionth of a second) Picoseconds (trillionth of a second) l Program instruction processing speeds Megahertz (millions of cycles per second) Gigahertz (billions of cycles per second) l Commonly called “clock speed” l Expressed in gigahertz (pg.90)
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/30/2010 for the course MIS 388 taught by Professor Kohers during the Spring '08 term at Sam Houston State University.

Page1 / 37

Ch.3 Notes - Chapter 3 Click to edit Master subtitle style...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online