1) History Of Computers Part-1
1) History Of Computer Part-3
Insignificant progress took place over the next decades. In the United States the 1890 census was approaching, and there was on way that it could be completed by 1900, as required by the constitution. Herman Hollerith, an employee of the Census Office Washington, started to develop an automated device to complete this task in ten years. The result was Holleriths tabulator. A manual card puncher, a card reader, and an electromechanical card sorter were the main components of this machine.
With this tabulator, Hollerith was able to complete the census calculations in only two years. Holleriths success paved the way for further research and development. Analog computers, a new class of computing devices, emerged. These devices used electrical voltages to represent physical quantities. They functioned by establishing an analogy between a physical quantity and a voltage level. They were very east but not sufficiently accurate.
The first electronic computers, the ABC (Atanasoff Berry Computer) and the ENIAC (Electronic Numerical Integrator And Calculator) were built in USA in the early 1940s. The ABC, built by Atanasoff and Berry, was the first electronic computer using vacuum tubes. The ENIAC, built by Eskert and Mauchly, was an special purpose computer. In first general purpose electroic computer operating under the control of a stored program, was completed. A stored program is a set of instructions stored in memory that guides the computer, step by step, through a process.
1) History Of Computer Part-3
Insignificant progress took place over the next decades. In the United States the 1890 census was approaching, and there was on way that it could be completed by 1900, as required by the constitution. Herman Hollerith, an employee of the Census Office Washington, started to develop an automated device to complete this task in ten years. The result was Holleriths tabulator. A manual card puncher, a card reader, and an electromechanical card sorter were the main components of this machine.
With this tabulator, Hollerith was able to complete the census calculations in only two years. Holleriths success paved the way for further research and development. Analog computers, a new class of computing devices, emerged. These devices used electrical voltages to represent physical quantities. They functioned by establishing an analogy between a physical quantity and a voltage level. They were very east but not sufficiently accurate.
The first electronic computers, the ABC (Atanasoff Berry Computer) and the ENIAC (Electronic Numerical Integrator And Calculator) were built in USA in the early 1940s. The ABC, built by Atanasoff and Berry, was the first electronic computer using vacuum tubes. The ENIAC, built by Eskert and Mauchly, was an special purpose computer. In first general purpose electroic computer operating under the control of a stored program, was completed. A stored program is a set of instructions stored in memory that guides the computer, step by step, through a process.
