Chapter 3 Practical

      Internet & Email

• Internet: it is a network of computers from all over the world connected together by telephone lines, fibre optic cables and satellite.

• To connect on the Internet, a person needs these 4 things:  

1. A Computer System
2. A Telephone Line
3. A Modem
4. Internet Service Provider

• ISP: means for Internet Service Provider. It's a company with whom anyone wanting to connect to the Internet the person needs to subscribe.
• WWW: stands for World Wide Web. It's the most popular part of the Internet. It contains a lot of pages of information.
• HTTP: stands for Hyper Text Transfer Protocol. It's a set of rules which identify how files on the www are transferred.

                                                                                 

Chapter 3 Theory

       Input and Output Devices

1. Keyboard: this has keys that allow a user to enter data into a computer. It's application is Word Processing.
2. Mouse: to move, it uses devices that emit and sense light to detect the movement. It's application is Menu Selection.
3. MICR: it stands for magnetic ink character recognition. This can read texts printed with magnetized ink. It's application is Bank.
4. OMR: Optical Mark Recognition can sense hand-drawn marks such as small shapes. It's application is correction of multiple-choice questions.
5. Impact Printers: these are printers that make noise. Example  dot-matrix printer.
6. Non-Impact Printers: these are printers that don't make a lot of noise. Example Ink-jet Printer.
7. Dot-Matrix Printer: this is a printer that produces images with a print head striking mechanism.
8. Ink-Jet Printer: this forms letters by spraying tiny drops of liquid inkon a piece of paper.
9. Vector: it is when the image is made up of lines.
10. Raster: it is when the image is made up of dots.

 dot-matrix printer



                                                          keyboard



mouse

Chapter 2 Practical

 

      Wordproccessing

• Mail Merge: it is used to create letters by combining together a form letter and a list of data that may include names & addresses.
• Layout Settings: the document contains of margins, tabs, font changes and the set and reset of italics and boldface.
• Table of Contents: it's a list of the headings in a document and together with their page number.
• Index: it lists the topics in a document along with the pages.
• Columns: it's a format that is usually used by newspapers.
• Spelling Checker: this document gives you suggestions of grammar mistake