| Inventions |
Inventors |
Characteristics |
Applications |
| Abacus 1602 |
China |
First mechanical calculating device.
A horizontal rod represents the one, tens, hundred, etc.
|
Used for addition and subtraction operations.
Calculation of square roots can also be performed.
|
| Napier’s Bones 1617 |
John Napier (Scotland) |
Three dimensional structure.
Holding numbers from 0 to 9 only.Represent graphical structure of calculating result.
Technology used for calculation called Rabdologia
|
Perform multiplication of numbers.
|
| Pascaline 1642 |
Blaise Pascal (France) |
First mechanical adding machine.
This machine worked on the principle of odometer and watch.
Mainly designed with regard to the pressure of liquid.
|
Perform addition and subtraction of two numbers..
|
| Jacquard’s Loom 1801 |
Joseph Marie Jacquard (France) |
It was first mechanical loom
TUsed punched card for the sequence of operation
|
Simplified the process of textiles.
|
| Analytical Engine 1837 |
Charles Babbage(London) |
First general-purpose computer
Stored program in the form of ‘pegs’ also called barrels.
|
It was a decimal machine used sign and magnitude for representation of a number.
|
| Tabulating Machine 1890 |
Herman Hollerith (America) |
It used punched cards for reading numbers
It was the first electromechanical [email protected]
|
It was used in the 1890 census.
|
| MARK-1 1944 |
Howard Aiken(America) |
Consists of interlocking panels of small glass, counters, switches and control circuits.
Data can be entered manually.
|
Mainly used in the war effort during World War-II.
Magnetic drums are used for storage.
|
| ENIAC 1946 |
JP Eckert and JW Mauchly (America) |
It is a combination of twenty accumulators.
First electronic digital computer.
|
Used for weather prediction, atomic energy calculation and other scientific uses.
Used in IBM and other.
|
| EDVAC 1947 |
John Von Neumann (America) |
Electronic digital computer
|
Logical design of a computer with a stored program
|
| EDSAC 1949 |
Maurice Wilkes(America) |
It was the first computer which provided storage capacity
First computer program was run on machine.
|
Capable of storing instructions and data in memory.
Used mercury delay lines for memory, vacuum tubes for logic.
|
| UNIVAC 1951 |
J. Presper Eckert and John Mauchly (America) |
First general-purpose electronic computer with large amount of input and output.
|
Used magnetic tapes as input and output
Use for account work.
|
| IBM-650 Computer 1953 |
IBM Company |
Provided input/output units converting alphabetical and special characters to two-digit decimal code.
|
Payroll processing
Oil refinery design/li>
Market research analysis
|
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