Notice: Payments for answers will end 4/10/2017. Click for more info.
You have new items in your feed. Click to view.
Question and answer
Q: Trace the history of computer from 12th century till date
A: 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.
26,443,515 questions answered
Popular Conversations
What is the solution to the proportion? n/18 = 5/9 A. n = 2.5 B. n ...
Weegy: n/18 = 5/9; 9n = 5 * 18 9n = 90 n = 90/9 n = 10
10/12/2017 10:59:55 AM| 8 Answers
What country is John Hus from?
10/11/2017 11:05:31 AM| 2 Answers
The two infinitive functions are adjectives and noun. true or faslse
Weegy: The two infinitive functions are adjectives and noun. TRUE.
10/11/2017 11:35:51 AM| 2 Answers
A baby is usually able to self-feed with soft finger food at about ...
Weegy: A baby is usually able to do some self-feeding with soft finger food at about the age of eight months.
10/11/2017 2:04:19 PM| 2 Answers
During what part of "Bernice Bobs Her Hair" does Bernice cut ...
Weegy: Bernice cuts Marjorie's hair while she sleeps, and throws the braids in a car and walks down the street with her ...
10/12/2017 7:14:11 AM| 2 Answers
The Moon is made up mostly of _______, similar to minerals on Earth. ...
Weegy: The Moon is made up mostly of silicates, similar to minerals on Earth.
10/12/2017 9:54:42 AM| 2 Answers
The leader of the PLO (Palestine Liberation Organization) is A. ...
Weegy: IRELAND withdrew from the British Commonwealth to form an independent republic. User: The American ...
10/13/2017 7:26:44 AM| 2 Answers
Weegy Stuff
S
P
P
L
P
P
P
Points 140 [Total 2032] Ratings 11 Comments 30 Invitations 0 Offline
S
P
L
Points 100 [Total 122] Ratings 0 Comments 100 Invitations 0 Offline
S
Points 77 [Total 77] Ratings 4 Comments 37 Invitations 0 Offline
S
Points 11 [Total 11] Ratings 0 Comments 1 Invitations 1 Offline
S
Points 2 [Total 2] Ratings 0 Comments 2 Invitations 0 Offline
S
Points 2 [Total 2] Ratings 0 Comments 2 Invitations 0 Offline
S
Points 1 [Total 1] Ratings 0 Comments 1 Invitations 0 Offline
S
Points 1 [Total 1] Ratings 0 Comments 1 Invitations 0 Offline
S
Points 1 [Total 1] Ratings 0 Comments 1 Invitations 0 Offline
S
L
Points 1 [Total 100] Ratings 0 Comments 1 Invitations 0 Offline
* Excludes moderators and previous
winners (Include)
Home | Contact | Blog | About | Terms | Privacy | © Purple Inc.