1.1 what is a computer?
a computer is an electronic device that manipulates information, or “data” its has the ability to store, retrieve and process data. you can use a computer to type document, send email, and browse the internet you can also use it to handle spreadsheets, accounting, database managment, presentations, games, and more.
1.2 computer simplified
for beginnig computer users, the computer aisles in an electronics store can be quite a mystery, not to mention overwhewing. however computer really aren’t that mysterios. all types of computers consist of two basic part.
hardware: is any part of your computer that has a physical structure, such as the computer monitor or keyboard.
sofware: is any set of instructions that tells the hardware what to do. it is what guides the hardware and tells it how to accomplish each tasks some examples of sofware are web browsers,ganes,and word processors such as microsoft word.
1.3 different types of computers
when most people hear the word “computer” they think of a personal computer, such as a desktop or laptop computer,however, computers come in many shapes ans sizes.and they perform many DIFFERENT FUNCTION in our daily lives. when you withdraw cash from an ATM scan groceries at the store, or use a calculator, you”re using a type of computer,
many people use desktop computers at work, home, school, or the library. they can be small, medium or karge in style, and usually sit on desk. once on you add a monitor, mouse, and a keyboard, you have what is typically known as a desktop computers are easy to upgrade and expand, or add new part, another benefit of desktop computer is the cost if you compare a desktop and a laptop with the same features, you will most likely find that the desktop computer is priced lower. some desktop computers have a built-in in monitor to save space. these are often called all in-one desktop computer.
the second type of computer that you may be familiar with is a laptop computer or laptops as they are often referred to. laptops are baterry or AC- powerred personal computers that are more portable than desktop computers ,allowing you to use them almost anywhere. since a laptop is smaller than desktop . its more difilcult to access the internal compenents. that mean you may not be able to upgrade them as much as a desktop . however, its usually possible to add more RAM or a bigger hard drive. a laptop computer is sometimes called notebook computer because of its size.
a servers is a computer that “servers up” information to other computer on a network many bussiness have fail servers that employess can use to store and share file . a server can look like a regular desktop computer. or it can be much larger. servers also play an important role in making the internet work. they are where web pages are stored. when your use your browser to click a link. a web server delivers the page you requested.
other types of computer
today. there are many different type of computers that you can buy, and some of them are even more portable than laptop. here are a few common example.
the ipad type of tablet computer .
tablet computer: these use a touch screen for typing and navigation. since they dont require a keyboard or mouse tablet computer are even more portable than laptops. the ipad is an example of tablet computer.
mobile phone: many mobile phone can do a lot of thing a computer can do. such as browsing the internet or playing games. these phone are often called smartphones.
game console: a game console is a spesialized kind of computer that is used for playing video games. although they are not as fully-featured as a desktop computer, many newer consoles. such as the nitendo will, allow you to do non gaming task like browsing the internet.
TVs: many TVs now include applications (or apps) that let you access various types of online content. for example. you can view you facebook new feed or watch streaming movie netflix.
PCs and macs
personal computer come on two main “styles” PC and MACS. both style are fully funtional, but they do have a different look and feel, and many people prefer one or the other.
A macs A PC
PC: this type of computer began with the original IBM PC that was introduced in 1981. other companies began to create similiar computers. which were called IBM PC compatible (often shortened to PC ) today, this is the most common type of personal computer, and it typically includes the microsoft windows operating system.
mac: the macintosh computer was introduced in 1984, and it was the first widely sold personal computer with a graphical user interface, or GUI (PRONOUNCED GOOEY) all macs are made by one company, apple inc. and they almost always use the mac OS X operating system. although PC can refer to an IBM PC Compatible, the term can also be used to refer to any personal computer, including macs.
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