1. History of Computers

2. Do you know who this really happy looking guy is???? Charles Babbage- also known as the Father of Computers

3. What is a computer? -A machine that is designed to do specific tasks in order to save time and make our lives easier! -an electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program.

4. Pre-Computers 1. Language People primarily communicated through spoken language. 2. Paper/Ink Created records by writing everything down and saving papers. 3. Abacus Used to help count in trade deals then eventually used by children to learn math.

5. Pre-Computers 4. Pascal’s Slide Rule – 1600’s A mechanical adding / subtracting machine with gears. An enhanced version of the Abacus Used notched dials and internal wheels to move the answer indicator along as it counted

6. Pre-Computers 5. Babbage’s Engine 1800’s – an English mathematician tried to complete a mechanical (not electronic) analytical engine that would string together hole punched cards and produce a result.

7. Pre-Computers 6. Hollerith’s Tabulator –Invented by Henry Hollerith (late 1800’s) –More efficient than Babbage’s Engine –Calculated the 1890 United States Census.

8. First Computers The first computers of the modern age were code breaking, encryption machines used in WWII.

9. Enigma A machine used by the Nazi-Germans to break code. U.S. acquired this machine through the British who stole it from the Germans during the WWII. A starting point for us to build our own encryption machine

10. Computers and Government Colossus- Built by British Government to decipher the German Transmissions through the Enigma ENIAC- Developed in Philadelphia. Used to calculate firing tables that helped calculate trajectory for missiles. ENIAC would only work for about 30 minutes at a time.

11. ENIAC / UNIVAC

12. Computers in the 1940’s Made of circuit boards and vacuum tubes No screens Data was outputted through the machine in the form of a hole punched 80 column card which revealed the answer. Were Enormous!

15. Computers in the 1950’s Transistors were invented. Less circuit boards / vacuum tubes needed Made computers smaller, faster, more powerful and less expensive. Computers now only took up 1 room!

16. Transistor

17. 1950s Computer

18. Computers and Business With Mainframe computers (Transistors) at a manageable size, Businesses began to buy for use in the work place.

19. International Business Machines (IBM) “Big Blue” was the most powerful computer company around Sold mainframes to companies

20. Computers in the 1960’s “The Mini-computer Era” Silicon chips invented (Silicon Valley, CA) Smaller, faster, more powerful, cheaper Sized reduced to about 1/4 th of a room. All programmed in Binary language.

21. Computers in the 1970’s Micro chips invented! Companies started selling “computer kits” to the public. Steve Jobs and Steve Wozniak come together and start business called “Apple”. Focus on personal computers.

22. Apple vs. Microsoft VS.

23. Computer continue to get smaller, smaller, faster and more common place. If computers have changed so drastically in the past 50 years, what changes can we expect in the next 50???