Ex1+T3+Question+3

3. Mention at least 8 things that happened during the computer pre-history period mentioned in class. Explain why they are considered important enough to be in such time line.


 * Abacus: It was the beginning of calculators and the first computers where used as big "scientific" calculators. The abacus was of great importance because it was the first creation that showed that mankind needed to count, this later became one of the purposes of computers.


 * Napier Bones: It allowed the user to do more complex calculations than with the abacus, this is notable be cause it can be considered the veryvery early ancestor of computers.


 * Pascaline Calculator: It was the first portable calculator, used to calculate taxes.


 * Gottfried Leibnitz, he developed a calculator that could do multiplications and divisions.


 * Binary System: created by Gottfried Leibnitz. It is currently used as the computer's language without it the computers could not work.


 * Punched cards: It was the first storage unit for information. It allowed the user to share information through different punched card readers. Now it has almost disappeared except in some parking lot tickets.
 * Charles Babbage and the Differential Machine.

 
 * The Analytical machine was designed by Charles Babbage also, but he just did the design.
 * Herman Holerith, he created the census machine which was used in the United States for the census, which is a way in which the government counts the population.
 * IBM International Business Machines became the first company to develop computers, around the 1950's
 * HP, Hewlett Packard become another company that developed computers. IBM and HP became the giants in this area in those times.