A. Ancient Times
ABACUS- the first man made computing device. B. 1642: Adding Machine by Blaise Pascal
Blaise Pascal a french mathematician introduced his invention, the adding machine based upon the principle of abacus. This machine is one of the first mechanical computing devices because it used wheels to move counters.
C. 1647: Gottfried Wilhelm Von Leibnitz
Gottfried Wielhelm Von Leibnitz made improvements on Pascal's machine. He made the machine capable of performing multiplacation and division.
D. 1807 Automatic Weaving Loom by Joseph Jacquard
Joseph Jacquard, a Frenchman, invented the automatic weaving loom which introduced the used of punched cards. This invention made beautiful cholthes faster.
E. 1833: Analytical Engine by Charles Babbage
Charles Babbage was a English inventor and mathematician who is conseidered as the " Father of the Modern computers" and invented an analytical engine.
F. Ada Augusta Lovelace - Byron
world's first computer programmer.
G. 1890. Tabulating Machine by Herman Hollerith
Herman Hollerith who worked as statistician in the Census Bureau devised the tabulating machine used in the counting provess of the country's population.
H. 1944. Mark 1 By Howard Aiken
Mark 1 is the first general- purpose electro-mechanical computer ever built by man. It was made through the combined efforts of his colleagues in Harvard and International Business Machine; it could perform division, multiplication, subtraction and addition.
I. 1946. The First General Purpose Electro Digital Computer
ENIAC stands for Electronic Numerical Integrator Analyzer and Computer. It was completed and introduced by Mauchly and Eckert. It was a very impressive machine with ability to perform a single arithmetic operation in less than a second.
J. 1949: The First Stored Program Computer, EDVAC
EDVAC stands for Electronic Discrete Variable automatic Computer was the idea of Dr. John Von Neumann, special consultant of the ENIAC development team was asked by the army to come up with another machine more powerful than ENIAC. It was capable of storing programs inside tge computer itself.
K. 1951-1958. The First Generation Computers- The Vacuum Tubes
Universal Automatic Computer (UNIVAC) was first introduced in June 14 1951 and manufactured by Remington Rand as a general purpose, stored program electornic digital computer. First generation computers such as UNIVAC were vacuum tube machines.
L. 1959-1964. The Second Generation Computers - The Transistors
Using transistors, computers became available in smaller sizes and computer processing became much faster and more realible. The transistors used by UNIVAC were developed by three Bell Lab scientists- J. Bardeen, H.W. Brattain, and W, Shokley.
M. 1965-1970 The third Generation Computer- The Intergrated Circuit
The third generation computers were alrady made out of intergrated circuits, a logic circuit on a tiny chip of silicon. The chip maybe less than 1/8 inch and made up of a semiconductor material.
N. 1971-1979. The Fourth Generation Computers - The Microprocessor.
The fourth generation computers, known as microcomputers utilized the microprocessor. It was developed by Inter Corporation and became commercially available in 1971.
O. 1980-Present. The Fifth Generation Computers
The fifth generation computers were characterized by even greater speed. Small scale computers were able to operate with a speed of up to 5 million instructions per one second. Large scale computers can operate at an even higher speed.
