1. Dannelly'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 Apple's iPad uses the A4 system chip with 177 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 1947 - Bell Labs Bardeen, Brattain, Shockley Noble Prize in 1956 This IBM 1301 Disk Storage Unit held 2.8 MB of data. Lease = $2100 per month

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 Microsoft in 1978

11. Fifth Generation massively parallel computers  supercomputers still not in everyone's home Possible Revision of "5 th Generation"  maybe it was the internet-ization of every device  maybe it was mobile-ization of every device, thanks to Lithium-Ion batteries allowing smaller devices

12. Moore's Law http://en.wikipedia.org/wiki/File:Transistor_Count_and_Moore%27s_Law_-_2008.svg computing power doubles every two years

13. Computers Sold Annually Units = 1000 graph from www.pegasus3d.com/total_share.html

14. The Future The Cloud Even more Ubiquitous Computing ?

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