Lesson 1 Flashcards
Indicate What Year Every The Late Evolution of Computers
- ______ IBM PC
- ______ Franklin Ace, Commodore 64, ZX Spectrum
- ______ IBM PC XT , Apple Lisa
- ______ Macintosh
- ______ Next Turbo Dimension Cube
- ______ Deep Blue
- ______ Imac
8 .______ Ipad
- 1981
- 1982
- 1983
- 1984
- 1990
- 1996
- 1998
8 .2010
- A counting device
- Beads are moved to perform arithmetic functions
- Still used by traders and clerks in Asia, Africa, …
Abacus - Calculator
What year was Abacus - Calculator invented?
2700 - 2300 BC
Who Invented the Slide Ruler?
William Oughtred
- An early analogue computer used primarily for multiplication and
division - This were taken to the moon in the 1960s
Slide Ruler
What year was the Slide Rule invented?
1620
- Performed addition and subtraction
- Was too expensive for the time, hence it didn’t become a commercial
device.
Pascaline
Who created the first mechanical calculator?
Blaise Pascal
- This were created by people called
’computers’. - They were large charts showing the results of calculations, e.g. multiplication, division, and trigonometry
- However, these were known to be error prone,
- Thus the need for more accurate math drove innovation.
Mathematical Tables / Tables
- Noticed errors in mathematical tables (1820)
-Created the difference engine to compute this math more accurately - Used tons of grant money as well as his own
- Only built a small part, as he also had to construct the tools to build it
- The difference engine wasn’t finished, and he went on to design the Analytical engine.
Charles Babbage
-The first mechanical computer
- Compiled mathematical tables ◦ add, subtract, polynomial functions
Difference Engine
Who created the Difference Engine?
Charles Babbage “father of
computing”
What year was the Difference Engine invented?
1821
- She wrote the first algorithm that would have been executed by the Analytical Engine
- She is considered the worlds first programmer
Ada Lovelace
- Stiff paper that holds commands
- Commands and data are indicated by holes/no holes
- Early computers used these as input commands
Punch Cards
- During the Industrial revolution the population 30% each decade.
- They were still tabulating census data by hand.
- In 1887 they still had not completed tallying the 1880 census data
- an MIT prof introduced punch cards and a machine to read them to tally this information.
- Took only 6 weeks to tally the 1890 census
- He continued to improve the machine, and created the company IBM
Herman Hollerith
- Based on Vacuum tubes
- Vacuum tubes: Control electric current using the vacuum, and
- Can be used to start/stop, or change the flow based on the current
1st Generation Computers
What year was the 1st Generation Computers invented?
1951 -1959
- During WWII it created an electromechanical machine to break
German Ciphers. - It is estimated that his efforts in breaking the ciphers reduced the
length of the war by 2 – 4 years.
Alan Turing
- A electro-mechanical computer
- Developed and built by IBM
- Could store 72 numbers
- Multiplication took 6 seconds
- Used in WW II to compute
artillery tables - Produced Mathematical
Tables
Harvard Mark 1
Who created the Harvard Mark 1?
Howard Aiken and Grace Hopper
What year was the Harvard Mark 1 invented?
1944
Who found the first computer bug while working on the Harvard Mark II?
Grace Hopper
- A moth was trapped between two relay switches
First Computer Bug