1. University of Utah 1 IBM “business machines” -punch cards -electromechanical calculators slow introduction of electronic machines

2. University of Utah 2 IBM 701 “Electronic Data Processing Machine”

3. University of Utah 3 IBM 701 2000 multiplications per second Plastic tape, not metal

4. University of Utah 4 Memory Williams Tube -CRT for memory, not pictures! -1024 bits

5. University of Utah 5 IBM 701 Marketing -1954 election prediction -English/Russian translation 19 systems installed!

6. University of Utah 6 Sell or rent? IBM rented, not sold, their computers UNIVAC sold, not rented. Advantages? Disadvantages?

7. University of Utah 7 ERA Engineering Research Associates -Spinoff from Navy -Build drum memory

8. University of Utah 8 ERA Navy “Task 13” Commercial “Model 1101”

9. University of Utah 9 ERA Ran out of money Bought out by Remington Rand -same people who bought UNIVAC! -Marketed 1103 for science -UNIVAC for business conflict of interest?

10. University of Utah 10 10 Drum memory Durable but slow -(picture on page 39)

11. University of Utah 11 11 CRC Computer Research Company -“102A computer” Bought out by NCR

12. University of Utah 12 12 Notice a Pattern? 1.New company experiments with new technology 2.Runs out of money 3.Bought by established company as easy path to new business This is not a new phenomenon!

13. University of Utah 13 13 LGP-30 Librascope/General Precision -famous drum computer -cheap ($30,000) -small (desk-size)

14. University of Utah 14 14 Flexowriter Only I/O device for many computers

15. University of Utah 15 15 Bendix G-15 Another drum-based computer Fast but difficult to program

16. University of Utah 16 16 IBM 650 IBM's drum machine 1000 installed! Discount price for universities

17. University of Utah 17 17 IBM 650

18. University of Utah 18 18 Computer sales BINAC: 1 UNIVAC: 46 IBM 701: 19 LGP-30: 400 Bendix G-15: 400 IBM 650: 1000

19. University of Utah 19 19 How do you write a (non-infinite) loop without a break condition?

20. University of Utah 20 20 2 Reminders and 1 Announcement Enigma homework due tonight at 7:30pm ENIAC assignment due next Friday! No school on Monday

21. University of Utah 21 21 “Test Question” On a scrap of paper, write a question that encapsulates one of the points from today's class, and turn it in. (Put your name on it!)