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ESSAY SAMPLE ON "THE PAST, PRESENT AND FUTURE OF COMPUTERS" |
Imagine being able to do almost anything right from your own living room. You could order
a pizza, watch cartoons, or play video games with people from around the entire world.
All are possible today with your computer. The beginnings of the computer started off in
a rather unique way. It was first used to produce intricate designs with silk, a task
far to long a tedious for a human to do constantly. It's really unbelievable how the
computers changed from that to what they are now. Today, computers are completely
astounding. The possibilities are endless. Who knows where they will take us in the
years ahead. The computer is the most influential piece of equipment that has ever been
invented.
The begginings of the computer are actually kind of strange. It started in the 1800's
when a man named Charles Babbage wanted to make a calculating machine. He created a
machine that would calculate logarithms on a system of constant difference and record the
results on a metal plate. The machine was aptly named the Difference Engine. Within ten
years, the Analytical Engine was produced. This machine could perform several tasks.
These tasks would be givin to the machine and could figure out values of almost any
algebraic equation. Soon, a silk weaver wanted to make very intricate designs. The
designs were stored on punch-cards which could be fed into the loom in order to produce
the designs requested. This is an odd beginning for the most powerful invention in the
world.
In the 1930's, a man named Konrad Zuse started to make his own type of computer. Out of
his works, he made several good advances in the world of computing. First, he developed
the binary coding system. This was a base two system which allowed computers to read
information with either a 1 or a 0. This is the same as an on or and off. The on or off
functions could be created through switches. These switches were utilized with vacuum
tubes. The functions could then be relayed as fast as electrons jumping between plates.
This was all during the time of the Second World War and further advancements were made
in the area of cryptology. Computer advancements were needed in order for the Allied
Coding Center in London to decode encrypted Nazi messages. Speed was of the essence, so
scientists developed the first fully valve driven computer. Before this, computers only
had a number of valves, none were fully driven by them because of the complexity and
difficulty of producing it. Despite the odds, several Cambridge professors accomplished
the mammoth task. Once it was built, the computer could decode the encrypted messages in
enough time to be of use, and was an important factor in the end of World War II.
The war also provided advancements in the United States as well. The trajectory of
artillery shells was a complex process that took alot of time to compute on the field. A
new, more powerful computer was in dire need. Working with the Moore School of
Electrical Engineering, the Ballistics Research Laboratory created the Electronic
Numerical Integrator and Computer. The ENIAC could compute things a thousand times
faster than any machine built before it. Even though it was not completed until 1946 and
was not any help during the war, it provided another launching pad for scientists and
inventors of the near future. The only problem with the ENIAC was that it was a long a
tedious process to program it. What was needed was a computation device that could store
simple ?programs? into it's memory for call later. The Electronic Discrete Variable
Computer was the next in line. A young man named John von Neumann had the original plan
for memory. His only problem was where and how could the instructions be stored for
later use. Several ideas were pursued, but the one found most effective at the time was
magnetic tape. Sets of instructions could be stored on the tapes and could be used to
input the information instead of hand feeding the machine every time. If you have ever
heard of a ?tape backup? for a computer, this is exactly what this is. All the
information on your computer can be stored on the magnetic tape and could be recovered if
your system ever crashed. It's strange that a method developed so long ago is still in
use today, even though the computer today can do alot more than simply ?compute?.
The computer works in a relatively simple way. It consists of five parts; input,
output, memory, CPU, and arithmetic logic unit. Input is the device used by the operator
of the computer to make it to what is requested. The output display the results of the
tasks created from the input. The data goes from the input to the memory then to the
arithmetic logic unit for processing then to the output. The data can then be stored in
memory if the user desires. Before the advent of the monitor, the user would have to
hand feed cards into the input and wouldn't see the results until it was displayed by the
printer. Now that we have monitors, we can view the instant results of the tasks. The
main component that allows the computer to do what is desired is the transistor. The
transistor can either amplify or block electrical currents to produce either a 1 or a 0.
Previously done by valves and vacuum tubes, the transistor allows for much faster
processing of information. The microprocessor consists of a layered microchip which is
on a base of silicone. It is a computer in itself and is the most integral part of the
CPU in modern computers. It is a single chip which allows all that happens on a
computer. Integrated circuits, a microchip which is layered with it's own circuitry,
also provide a much more manageable memory source. The only reason magnetic tape backups
are used today is because of the space which is needed in order to backup an entire
computer. Memory for todays computers consist of RAM or ROM. ROM is unchangable and
stores the computers most vital componants, it's operating instructions. Without this,
the computer would be completly inoperable. Programs today use the instructions in the
ROM to complete the tasks the program is attempting. This is why you cannot use IBM
programs on a Macintosh, the ROM and operating systems are different, therefor the
programing calls are different. Some powerful computers today can complete both sets of
tasks because they have both sets of instructions in the stored in the ROM. The reason
ROM is unchangable is because of people who don't know what they are doing could mess
things up on their computer forever. RAM is the temporary memory that is in a computer.
This is the memory that is used by programs to complete their tasks. RAM is only
temporary because it requires a constant electrical charge. Once the computer is shut
off, the RAM loses everything that was in it. That is why you lose work that you have
done if the power goes of and you didn't save it first. If something needs to be saved,
it is either saved to the hard disk within the computer or a floppy disk. With today's
networking capabilities, things can be saved on completly seperate machines called
?servers?. Though the process of saving is the same, a server can be located five feet
away or on the opposite side of the world.
With today's technology, anything is possible with the use of a computer. You could
visit a website and find that special someone, or create a virus that could crash
thousands of machines at a single moment in time. If you have the money, the
possibilities are endless. In today's day and age, information is sacred. One of the
biggest problems found with information is what is free and what isn't. There will
always be people who want more information than will be alloted to them, today, these
people are known as hackers. Hackers use their individual knowledge to gain access to
information that is not meant for them to know. It is almost a shame that hackers have
such a bad reputation. Most are teenagers who are looking to gain more information. Of
course, some are dedicated to destruction and random violence, but there always will be
those types of people in the world. Of course, there is personal information that is
transmitted over the Internet that no one but the inteded party and yourself should have
access to (i.e. your credit card numbers and expration dates) but who decides what is and
what isn't personal information. This is a problem that has greatly prevented the growth
of the Internet into major companies. In the future, it can only get worse. At the rate
we are going, everything will be computerized and stored electronicaly. This means that
with the know-how, anyone could access your information. If you have ever seen the movie
?The Net? , you know exactly what I am talking about. If all information is stored
electronicaly, anyone with the desire can view, change, remove, or add your personal
attributes. With enough effort, one could take away someone's entire identity. This may
seem like a futuristic sci-fi novel, but it could be in our not so distant future.
The future of technology can only be guessed upon. I believe that the connection
between computers and humans will become much closer. People will feel the need to
become ?one? with their machines and possibly even be physicaly linked with them.
Information will be stored, transmitted, and viewed completly electronicaly. Perhaps an
implant directly into the brain will be the link between humans and computers. This
implant could feed you information directly off the Internet and several other sources.
I personally believe that this is extremely scary. Once that link is made, there will be
the desire to get even closer to the computer. A new, even more intimate link will be
made. The cycle will continue untill there is no line between humans and elctronics. We
will all be robots just reacting to instructions and following protocol. This is the
most horrifing thing I can imagine. Our identities will be removed and we will all
become one. I dont know, maybe I need to stop for a minuet before I completly terrify
myslef.
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