Question and answer
Trace the history of computer from 12th century till date
tool for use in computation was the abacus, and it was thought to have been invented in Babylon circa 2400 BCE. Its original style of usage was by lines drawn in sand with pebbles. [ [ This was the first known computer and most advanced system of calculation known to date - preceding Greek methods by 2,000 years. Abaci of a more modern design are still used as calculation tools today. The
Antikythera mechanism is believed to be the earliest known mechanical analog computer.[2] It was designed to calculate astronomical positions. It was discovered in 1901 in the Antikythera wreck off the Greek island of Antikythera, between Kythera and Crete, and has been dated to circa 100 BC. Technological artifacts of similar complexity did not reappear until the 14th century, when mechanical astronomical clocks appeared in Europe.[3] In the 3rd century CE the South Pointing Chariot was invented in ancient China. It was the first known geared mechanism to use a differential gear, which was later used in analog computers. The Chinese also invented a more sophisticated abacus from around the 2nd century BCE, known as the Chinese abacus.[citation needed] Mechanical analog computing devices appeared again a thousand years later in the medieval Islamic world. Examples of devices from this period include the equatorium by Arzachel,[4] the mechanical geared astrolabe by Ab? Rayh?n al- B?r?n?,[5] and the torquetum by Jabir ibn Aflah.[6] Muslim engineers built a number of Automata, including some musical automata that could be 'programmed' to play different musical patterns. These devices were developed by the Ban? M?s? brothers[7] and Al-Jazari[8] Muslim mathematicians also made important advances in cryptography, such as the development of cryptanalysis and frequency analysis by Alkindus. [9] When John Napier discovered logarithms for computational purposes in the early 17th century, there followed a period of considerable progress by inventors and scientists in making calculating tools. ] ]
Expert answered|bluplemud|Points 399|
Question
Asked 7/24/2012 2:43:44 AM
0 Answers/Comments
Get an answer
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
Questions asked by the same visitor
history of computer from 12the century to date
Weegy: The earliest known tool for use in computation was the abacus, developed in period 2700–2300 BC in Sumer. [ The Sumerians' abacus consisted of a table of successive columns which delimited the successive orders of magnitude of their sexagesimal number system.[2] Its original style of usage was by lines drawn in sand with pebbles. Abaci of a more modern design are still used as calculation tools today. ] (More)
Question
Expert Answered
Asked 7/23/2012 9:15:15 AM
0 Answers/Comments
18,795,510 questions answered
Popular Conversations
The US is the world’s leading producer of ...
12/19/2014 6:33:14 AM| 2 Answers
Solve: 2x + 16 = 40
Weegy: 2x + 3 = 5; 2x = 5 - 3; 2x = 2; x = 2/2; x = 1 User: Factor: x2 - 12x + 27
12/19/2014 7:51:37 AM| 2 Answers
monologue User: Shepheardes Calender
12/19/2014 11:08:20 AM| 2 Answers
Find the product mentally. (2m - 9)2
Weegy: 3-3 = 0 User: Select the correct product. (a + 8)(b + 3)
12/19/2014 11:08:48 AM| 2 Answers
Find the product mentally. (ab + 3)(ab - 3)
Weegy: 3-3 = 0 User: Find the product. (r + s)2
12/19/2014 11:11:21 AM| 2 Answers
Selena Gomez
Weegy: Selena Gomez is a celebrity and she does not give her phone number to public due to security purposes. User: ...
12/19/2014 1:00:12 PM| 2 Answers
Jim is beginning his research on franchise businesses in order to ...
Weegy: Jim is beginning his research on franchise businesses in order to find one that meets his needs. A quick, easy ...
12/19/2014 5:55:22 PM| 2 Answers
Weegy Stuff
S
L
P
Points 1083 [Total 4927]| Ratings 0| Comments 1083| Invitations 0|Offline
S
L
Points 695 [Total 1386]| Ratings 1| Comments 685| Invitations 0|Offline
S
1
L
1
L
P
P
L
P
Points 663 [Total 14848]| Ratings 0| Comments 663| Invitations 0|Offline
S
Points 651 [Total 651]| Ratings 1| Comments 641| Invitations 0|Online
S
P
C
L
P
L
1
Points 88 [Total 6407]| Ratings 1| Comments 78| Invitations 0|Offline
S
L
Points 68 [Total 1528]| Ratings 1| Comments 58| Invitations 0|Offline
S
1
L
L
Points 33 [Total 6700]| Ratings 0| Comments 33| Invitations 0|Offline
S
Points 30 [Total 30]| Ratings 0| Comments 0| Invitations 3|Offline
S
Points 23 [Total 29]| Ratings 0| Comments 23| Invitations 0|Offline
S
Points 22 [Total 22]| Ratings 0| Comments 2| Invitations 2|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2014 Purple Inc.