Input and Output

Discovering computer 2010 

Objective overview

• describe the types of output 
• explain the characteristics of various display devices
• describe the factors that affect the quality of an LCD monitor or LCD screen
• describe various ways to print
• differentiate between a nonimpact printer and an impact printer
• summarize the characteristics of ink-jet printer, photo printers, laser printer, thermal printers, mobile printers, label and postage printers, and plotters and large-format printers
• describe the uses and characteristics of speaker, headphone, and earbuds
• identify the purpose and features of data projectors, interactive whiteboards, and force-feedback game controllers and tactile output
• identafy output options far physically challenged user  

 What Is Output?

Output is data that has been processed into a useful form

An output device is any type of hardware component that conveys information to one or more people

•  display devices
• printer
• speakers, headphones, and earbuds
• data projectors
• interactive whiteboards
• force-feedback game controllers
• tactile output

Display Devices
 

•A display device visually conveys text, graphics, and video information

•A monitor is packaged as a separate peripheral

•         LCD monitor
•         Widescreen

  •Liquid crystal display (LCD) uses a liquid compound to present information on a display device

Input

1. Any information or data that's entered or sent to the computer to be processed is considered input. Input is most often sent to the computer using an input device such as a keyboard or mouse. In the picture to the right, is and example of input being sent from the computer keyboard to the computer.
2. In general can also refer to a contribution of feedback, information, or work. For example, someone may ask you for your input about a project they are doing at work or school.                           
3.  

   Output

   Any information that has been processed and comes from a computer or computer device is considered output. When someone is viewing output, they're seeing it on an output device such as a computer monitor or a hard copy print out. In the picture to the right, is an example of output being sent from the computer to a printer.
4.  

 

 

 

 

 

 

 

c

 

 

The Advantages & Disadvantages of The Internet:

The Internet or the World Wide Web is indeed a wonderful and amazing addition in our lives. The Internet can be known as a kind of global meeting place where people from all parts of the world can come together. It is a service available on the computer, through which everything under the sun is now at the fingertips of anyone who has access to the Internet.
To get ‘online’, meaning to connect to the Internet, you need to have:

• A Computer: Computer equipment is a sizeable investment and thus you should select a computer carefully. Before buying a computer, understand your needs and then choose one accordingly. See that it comes with a warranty and that after sales service is available in case you need it.
• Internet Service Provider: This is the software that you will require to get online. You can now choose from a dial-up service or 24-hour broadband services. This is the service that will help you to connect to the Internet and start your surfing experiences.

Advantages of the Internet

The Internet provides opportunities galore, and can be used for a variety of things. Some of the things that you can do via the Internet are:

• E-mail: E-mail is an online correspondence system. With e-mail you can send and receive instant electronic messages, which works like writing letters. Your messages are delivered instantly to people anywhere in the world, unlike traditional mail that takes a lot of time.
• Access Information: The Internet is a virtual treasure trove of information. Any kind of information on any topic under the sun is available on the Internet. The ‘search engines’ on the Internet can help you to find data on any subject that you need.
• Shopping: Along with getting information on the Internet, you can also shop online. There are many online stores and sites that can be used to look for products as well as buy them using your credit card. You do not need to leave your house and can do all your shopping from the convenience of your home.
• Online Chat: There are many ‘chat rooms’ on the web that can be accessed to meet new people, make new friends, as well as to stay in touch with old friends.
• Downloading Software: This is one of the most happening and fun things to do via the Internet. You can download innumerable, games, music, videos, movies, and a host of other entertainment software from the Internet, most of which are free.

Disadvantages of the Internet

There are certain cons and dangers relating to the use of Internet that can be summarized as:

• Personal Information: If you use the Internet, your personal information such as your name, address, etc. can be accessed by other people. If you use a credit card to shop online, then your credit card information can also be ‘stolen’ which could be akin to giving someone a blank check.
• Pornography: This is a very serious issue concerning the Internet, especially when it comes to young children. There are thousands of pornographic sites on the Internet that can be easily found and can be a detriment to letting children use the Internet.
• Spamming: This refers to sending unsolicited e-mails in bulk, which serve no purpose and unnecessarily clog up the entire system.

If you come across any illegal activity on the Internet, such as child pornography or even spammers, then you should report these people and their activities so that they can be controlled and other people deterred from carrying them out. Child pornography can be reported to:

• Your Internet service provider
• Local police station
• Cyber Angels (program to report cyber crime)

Such illegal activities are frustrating for all Internet users, and so instead of just ignoring it, we should make an effort to try and stop these activities so that using the Internet can become that much safer. That said, the advantages of the Internet far outweigh the disadvantages, and millions of people each day benefit from using the Internet for work and for pleasure.

Dunia ini umpama lautan yang luas. kita adalah kapal yang belayar di lautan yang telah ramai karam didalamnya.andai muatan kita adalah iman dan layarnya takwa nescaya kita akan selamat dan tersesat di lautan hidup ini