# How many letters

33 %
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Data & Analytics

Published on July 24, 2014

Author: s1210137

Source: slideshare.net

## Description

S1210137 wrote

How Many Letters? S1210137 Shunya Takahashi

Abstract If you write “Hello World!” in computer. Computer need to remember letters in It’s memory as a file. In this experiment find out how much memory it takes for the computer to "remember" a series of letters.

Introduction Verse Number of Words Hello World ! 10 This is count 11 A Number 7 Hello World 10 Hey hey Yo yo 10 This is the example 18 Verse If you have memorized Number of Words. It need to memorize complex pattern of 67 letters. It is a large amount of letters. How does a computer Remember information?

Since computers can't think like you and I, they can't remember things by forming associations. Instead they have to encode the information by using a pattern. One example is binary code, which is a pattern of zeros and ones that can be used to encode information and store it in your hard drive as a file. Each piece of information that is stored in a file takes up a certain amount of space in the computer's memory. Since a computer has a limited amount of memory, the size of each file needs to be measured so that the computer can keep track of how much memory has been used and how much memory is free. The amount of space that a file uses is called the file size, and is usually measured in kilobytes (KB) or megabytes (MB). In this experiment you will test how much memory is needed to store a simple piece of information, the letter A. Actually, one- thousand letter A's! But don't worry, I have a trick to keep you from tiring out your typing fingers.

Question •  How much information is a letter? •  How does the file size change as more letters (or characters) are added to a file? •  How is the size of a file measured?

Materials and Equipment •  computer •  word processing software (Text Edit, Microsoft Word, Word Perfect, Claris, etc..) •  graph paper •  colored pencils or markers

Experimental Procedure •  Open your word processing program. I can be any kind of program for writing and editing text files or documents. Some examples of editing software packages are Text Edit, Microsoft Word, Word Perfect or Claris Works. Open a new document. Usually this is done by clicking on "File" and then "New..." from the file menu at the top of your screen. Below is a box filled with 1000 letter A's:

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaa This is the 1000 Letters a’s. Copy the letter A’s By clicking-and- dragging to highlight all of the letters,then clicking “Edit” and “Copy” from the file menu at the top of your screen.

our new file contains 2000 letter A's. Save the file to your computer by clicking "File" and "Save" from the file menu at the top of your screen. Repeat steps 8-12 to make files with 3000, 4000, 5000, etc. letter A's in it. Remember to save each new file with a new name that reflects the number of letters in the file (like A3000.txt, A4000.txt, A5000.txt, etc.). After you have made and saved each file you can close your word processing application. Next, you will want to view the files you made by looking in the documents folder of your computer. Use the finder if you are using a Mac or the Start menu if you use a Windows PC. Write down the size of each file in a data table: File Name Numbmer of a’s File Size A 1000.txt 1000 A2000.txt 2000 A3000.txt 3000 A4000.txt 40000

Make a bar graph of your data. On the left side of the graph make a scale of file size from zero to just above your largest piece of data, in increments of 5,000 KB. For example, if my largest file size is 67,000 KB then I would make my scale go to a maximum of 70,000 KB. Draw a bar for each test file up to the number that matches the size of the file. Remember to label each bar with the number of letters in the file, label each axis, and to give your graph a descriptive title. What happened to the size of the file as more letters were added? Did you see the effect right away? How many letters did it take before you saw a noticeable change in file size?

Variations •  Try using different letters than the letter A, or combinations of letters. Try copying the alphabet over and over. Do you get a similar result? •  Try comparing different font styles or letter sizes. Does changing the font size increase the file size? Do some font styles take more memory than other styles? •  If you have more than one text editor or word processing program, you can compare the file sizes for the same text created by three different applications. Save the same text as a file in each application and compare the file sizes. Are the files the same size? Which application creates files that use the most memory? Which application creates files that use the least? How might this relate to the number of features that each application offers? •  For a more advanced project, you can make a line graph of your results from each application. Put the number of letters on the X-axis and the file size on the Y-axis. Is the relationship linear? Does your line pass through the origin? What information might the Y-intercept tell you about the baseline for each application? Is the Y-intercept the same for each application? Is the slope the same for each application?

Terms and Concepts •  To do this type of experiment you should know what the following terms mean. Have an adult help you search the Internet, or take you to your local library to find out more! •  letter (character) •  text •  file •  memory •  kilobyte (KB) •  megabyte (MB)

Bioliography •  Each letter is a piece of information that is encoded and stored as a file in your computer. Find out about how information is stored and measured: T1 Shopper, 2006. "Byte Converter - File Size Calculator." [accessed: 3/10/06] http://www.t1shopper.com/tools/calculate/ •  In computing terminology a letter is one example of a character. Find out more about characters and how they are encoded: Wikipedia Contributors, 2006. "Character (computer)," Wikipedia, the Free Encyclopedia. [accessed: 3/10/06] http://en.wikipedia.org/wiki/Character_%28computing %29

Conclusion •  Computer need to remember letters too. •  Computer can be written to the file a lot of information, and save. •  This is also a feature of the large memory of the computer.

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