1. Computers and Text Daniel Velasquez Scott Baranick

2. Warm Up Can you decipher this secret message? 77 65 6C 63 6F 6D 65

3. Representing Text ASCII (7-bit) is the first standardized code system ASCII (7-bit) is the first standardized code system ASCII contains codes for 128 different characters ASCII contains codes for 128 different characters

4. ASCII Stands for: A merican S tandard C ode for I nformation I nterchange A merican S tandard C ode for I nformation I nterchange

5. ASCII Code Chart

6. ASCII 77656C636F6D65 welcome

7. Decipher These Words Can you decipher these coded phrases? 59 65 6C 6C 6F 77 21 62 6F 62 40 6D 73 6E 2E 63 6F 6D

8. The Number 5 vs. the Symbol 5 What do all the symbols between 30 and 39 represent? 35 = The symbol "5" 5 = The number 5 5 = The number 5

9. Transforming ASCII numeric symbols from 0 - 9 How would you convert the digit "5" into the number 5? How would you convert the digit "5" into the number 5?

10. Transforming ASCII Characters Find the ASCII codes for "DOG" Find the ASCII codes for "DOG" Find the ASCII codes for "dog" Find the ASCII codes for "dog" In your own words, what would you do to transform "DOG" into "dog"? In your own words, what would you do to transform "DOG" into "dog"?

11. What have We Learned So, what happens when you type the letter A? Some think the computer stores a little picture of the letter A into your document. Some think the computer stores a little picture of the letter A into your document. In reality, the computer stores the ASCII code that represents the letter A into your document. In reality, the computer stores the ASCII code that represents the letter A into your document. The computer translates this code into a picture only when the computer needs: The computer translates this code into a picture only when the computer needs: –To show the letter on the screen, or –To print the letter on a report.

12. Other Code Systems ANSI code standard ANSI code standard –Extended the ASCII code to include symbols for European languages. –8 bit code, supporting 256 different letters and symbols. Unicode Unicode –up to 32 bits are used –more than 109,000 different symbols –covers 93 forms of human writing –Multiple languages can be used in the same document!

13. Let's do the Worksheet