1. Rouda's Very Short History of Computing CSCI 101

2. In the beginning… Pascal created a calculator in 1652 able to add and subtract photos from en.wikipedia.org

3. Charles Babbage (1791-1871) Math Tables Problem Difference Engine and Analytical Engines  Abilities add subtract loop (repeat instructions over and over) compare two numbers etc…  instructions and data were on punched cards

4. Harvard Mark 1 Mechanical, not electrical completed in 1943 used to compute artillery tables instructions on paper tape storage = 72 numbers

5. Digital Electronics 101 Transistors can perform AND, OR, NOT, etc Example - Half Adder: AND XOR Pentium 4 contains 42 million transistors

6. First Generation based on vacuum tubes ENIAC  1946 - Univ of Pennsylvania  programmed via wires EDVAC  based on ENIAC  program stored in memory UNIVAC  1951  first commercial machine

7. Second Generation 1955-1964 based on transistors

8. Third Generation based on Integrated Circuits mainframes and minicomputers  IBM 360 First offered in 1964 equally suited for business or science from 8K to 8M of memory

9. Fourth Generation based on VLSI  VLSI = Very Large Scale Integration  thousands of transistors per chip microcomputers  IBM PC released in 1981 photo from www.cs.indiana.edu

11. Fifth Generation Based on ??? technology

12. Computer Devices Sold Annually graph from http://www.publishing.umich.eduhttp://www.publishing.umich.edu

13. Software Development 697,000 software engineers and 585,000 computer programmers in US In 2008 the software industry in the US is valued at $457 Billion Top Software companies include: Oracle, IBM, Microsoft, Google, Accenture, SAP. source: www.nist.gov/ and www.wikipedia.comwww.nist.gov/www.wikipedia.com

14. Software Development What’s happening right now? IT jobs (software/hardware/network, etc.) are growing much faster than other industries. Financial companies are in-sourcing. Typical starting point – Contract to hire. source: www.nist.gov/ and www.wikipedia.comwww.nist.gov/www.wikipedia.com

15. Next Class… Computer Hardware  Components of a modern computer  What to look for when buying a computer Operating Systems  Differences in Windows, Mac, and Linux