3:05 am
Essay for PPL
The Computer Emerges!
By Roderick Hames
Computers have been around for quite a few years. Some of your parents were probably around in 1951 when the first computer was bought by a business firm. Computers have changed so rapidly many people can not keep up with the changes.
These changes have occurred so rapidly that many people do not know how our modern computer got its start.
The first Computing “Machines”
Since ancient times, people have always had to deal with data numbers. Early people tied knots in rope and carved marks on clay tablets to keep track of livestock and trade. Some people have considered the 5000 year old ABACUS—a frame with beads strung on wires to be the first true computing aid.
In the mid 1600’s, Blaise Pascal and his father, who was a tax officer himself, were working on taxes for the French government in Paris. The two spent hours figuring and refiguring taxes that each citizen owed. Young Blaise decided in 1642 to build an adding and subtracting machine that could aid in a tedious and time consuming process. The machine Blaise made had a set of eight gears that work together much like an odometer that keeps track of a car’s mileage. His machine encountered many problems: For one, it was always breaking down. Second, the machine was slow and extremely costly. And third, people were afraid to use a machine thinking it might replace their jobs. Pascal later became famous for math and philosophy, but he is still remembered for his role in computer technology. IN his honor, there is a computer language named Pascal.
The next step for computers arrived in the 1830’s when Charles Babbage decided to build a machine to help him complete and print mathematical tables. Babbage was a mathematician who taught at Cambridge University in England. He began planning his calculating machine calling it the Analytical Machine. The idea for this machine was amazingly like the computer we know today. It was to read a program from punched card, figure and store the answers to different problems, and print the answers on paper. Babbage died before he could complete his machine. However because of his remarkable ideas and work, Babbage is known as the Father of Computers.
The next huge step for computers came when Herman Hollerith entered a contest given by the U.S. Census Bureau. The contest was to see who could build a machine that would count and record information faster. Hollerith, a young man working for the Bureau built a machine called the Tabulating Machine that read and sorted data from punched cards. The holes punched on the cards matched each person’s answer to questions. For example, marriage, single, divorces were answered on the cards. The Tabulator read the punched cards as they passed over the tiny brushes. Each time a brush found a hole, it completed an electrical circuit. This caused special counting dials to increase the data for that answer.
Thanks to Hollerith’s machine, instead of taking seven and a half years to count the census information it took only 3 years, even with 14 million more people than the last census. Happy with success, Hollerith formed the Tabulating Machine Company in 1896. The company later sold in 1911. And in 1912 his company became the International Business Machines Corporation, better known as the IBM.
The First Electric Powered Computers
What is considered to be the first computer was made in 1944 be Harvard’s Professor Howard Aiken. The Mark I computer was very much like the design of Charles Babbage’s having mainly mechanical parts, but with some electronic parts. His machine was designed to be programmed to do many computer jobs. This all-purpose machine is not what we know as the PC or personal computer. The Mark I was the first computer financed by IBM and was about 50 feet long and 8 feet tall. It used mechanical switches to open and close its electric circuits. It contained over 500 miles of wire and 750,000 parts.
The First all Electronic Computers
The first all electronic computer was the ENIAC (Electronic Numerical Integrator and Computer). ENIAC was a general purpose digital computer built in 1946 by J. Presper Eckert and John Mauchly. The ENIAC contained over 18,000 vacuum tubes (used instead of the mechanical switches of the Mark I) and was 1000 times faster than the mark I. In twenty seconds, ENIAC could do a math problem that would have taken 40 hours for one person to finish. The ENIAC was built the time of World War II had as its first job to calculate the feasibility of a design for the hydrogen bomb. The ENIAC was 100 feet long and 10 feet tall.
More Modern Computers
A modern type computer began with John von Neumann’s development in software by binary code. It was von Neumann who began the practice of storing data and instructions in binary code and initiated the use of memory to store data, as well as programs. A computer called the EDVAC (Electronic Discrete Variable Computer) was built using binary code in 1950. Before the EDVAC, computers like the ENIAC could do only one task then they had to be rewired to perform a different task or program. The EDVAC’s concept of storing different programs on punched cards instead of rewiring computers led top the computers we know today.
While the modern computer is far better than the EDVAC of its time, computers today would not have been possible with the knowledge and work of many great inventors and pioneers.
