History of Computer Essay

1334 Words Jul 15th, 2011 6 Pages
HISTORY OF COMPUTER

THE PRE-MECHANICAL AGE:
3000 B.C. – 1450 A.D.

1. Writing and Alphabets – Communication

First development of signs corresponding to spoken sounds, instead of pictures, to express words.

Around 2000 B.C., Phoenicians created symbols that expressed single syllables and consonants (the first true alphabet)

The Greeks later adopted the Phoenician alphabet and added vowels; the Romans gave the letters Latin names to create the alphabet we use today.

2. Paper and Pens – input technologies.

Sumerians’ input technology was a stylus that could scratch marks in wet clay.

About 2600 B.C., the Egyptians wrote on the papyrus plant.

Around 100 A.D., the Chinese made paper from rags, on which
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The programming language Ada is named in her honor.

THE ELECTROMECHANICAL AGE:
1840 – 1940

1. The beginning of Telecommunication.

Voltaic battery
The first electric battery, known as the voltaic pile, was invented in 1800 by Alessandro Volta.

Telegraph
Samuel F. B. Morse conceived of his version of an electromagnetic telegraph in 1832 and constructed an experimental version in 1853.

Telephone and Radio

1876
Alexander Graham Bell developed the first working telephone and transmitted his now famous quotations “Watson, come here, I want you.”

1894
Guglielmo Marconi discovered that electrical waves travel through space and can produce an effect far from the point at which they originated.

1852
George Boole develops binary algebra. This became known as Boolean algebra and became important in the 20th century when binary computers were developed.

2. Electromechanical Computing

1853
Pehr and Edvard Scheutz complete their Tabulating Machine, capable of processing fifteen-digit numbers, printing out results, and rounding off to eight digits.

1885
Dorr Felt devices the Comptometer, a key driven adding and subtracting calculator.

1889
Felt’s Comptograph, containing a built-in printer, is introduced.

1890
The first person to successfully use punched cards—specifically for census taking—was Herman Hollerith. By the 19th century, the number of people in the United States was so large, it took seven years to count

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