You have new items in your feed. Click to view.
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
26,554,515 questions answered
Popular Conversations
n^6 · n^5 ÷ n^4 · n^3 ÷ n^2 · n
Weegy: (n^3)^2 * (n^5)^4 = n^6 * n^20; = n^26 User: 3^a · 3^b ÷ 3^c ÷ 3^d. The exponent on 3 is _____. Weegy: An ...
12/1/2016 8:53:12 AM| 6 Answers
0.000001 in scientific notation
Weegy: 1 x 10 raised to the -6th power OR 1 x 10^(-6) User: Evaluate the following expression. (-6)^-2 User: The ...
12/1/2016 8:20:29 AM| 4 Answers
Solve for x. 5x - 1 = 26 x = 27/5 x = 5 x = -5
Weegy: 5x - 1 = 26 5x = 26 +1 5x = 27 x = 27/5 User: What is the solution set of the following equation? -8x + x ...
12/1/2016 9:57:56 AM| 3 Answers
Which of the following religions has internal variations? A. Judaism ...
Weegy: All of the above religions have internal variations.
12/1/2016 10:54:43 AM| 3 Answers
y varies inversely with x k = 1.4 What is the value of x when y is ...
Weegy: y varies inversely with x. The equation is y = k/x where k is the constant. We were given y = 18 when x = 6, ...
12/1/2016 11:06:33 AM| 3 Answers
Find the GCF of 38m and 57n. 9mn 19mn 19
Weegy: The GCF of 38m and 57n is 19. User: What is the product of (-a + 3)(a + 4)? a2 - a - 12 -a2 - a - 12 -a2 - a ...
12/1/2016 7:08:09 AM| 2 Answers
where is payout button in weegy?
Weegy: The last Weegy payout was on 3rd July, 2012. User: how much i can from weegy questions?
12/1/2016 8:09:55 AM| 2 Answers
A spaceship traveled 93 billion miles. In scientific notation that ...
Weegy: A spaceship traveled 93 billion miles. In scientific notation that is d. 9.3 ? 1010 User: What is the ...
12/1/2016 8:28:16 AM| 2 Answers
Write pqqqqrr in exponential form.
Weegy: In exponential form it is e^pqqqqrr. User: Write pqqqqrr in exponential form. p q r Weegy: In exponential ...
12/1/2016 8:31:56 AM| 2 Answers
Find the product. (n^3)^2 · (n^5)^4
Weegy: (n^9)*(n^20) User: Find the product. (n^9) . (n^20)
12/1/2016 8:38:36 AM| 2 Answers
y varies inversely with x y = 2.5 when x = 5 What is the value of ...
Weegy: y varies inversely with x, the equation is in the form y = k/x where k is the constant. We were given y = 2.5 ...
12/1/2016 11:16:37 AM| 2 Answers
Weegy Stuff
S
Points 68 [Total 340] Ratings 1 Comments 58 Invitations 0 Offline
S
P
P
Points 22 [Total 701] Ratings 0 Comments 22 Invitations 0 Offline
S
Points 15 [Total 447] Ratings 0 Comments 15 Invitations 0 Offline
S
Points 10 [Total 32] Ratings 0 Comments 0 Invitations 1 Offline
S
Points 9 [Total 285] Ratings 0 Comments 9 Invitations 0 Offline
S
Points 8 [Total 8] Ratings 0 Comments 8 Invitations 0 Offline
S
P
P
L
Points 7 [Total 1600] Ratings 0 Comments 7 Invitations 0 Offline
S
Points 0 [Total 0] Ratings 0 Comments 0 Invitations 0 Offline
S
Points 0 [Total 0] Ratings 0 Comments 0 Invitations 0 Offline
S
Points 0 [Total 0] Ratings 0 Comments 0 Invitations 0 Offline
* Excludes moderators and previous
winners (Include)
Home | Contact | Blog | About | Terms | Privacy | © Purple Inc.