Now a days computer is an important parts of our everyday life. But most of all user of a computer doesn't how many types. Today we will discuss about it.
Most computers are meant to be used by only one person at a time. Such computers are often shared by several people (such as those in your school’s computer lab), but only one user can work with the machine at any given moment .
Most computers are meant to be used by only one person at a time. Such computers are often shared by several people (such as those in your school’s computer lab), but only one user can work with the machine at any given moment .
» Desktop computers
» Workstations
» Notebook computers
» Tablet computers
» Handheld computers
» Smart phones
These systems are all examples of personal computers (PCs) a term that refers to any computer system that is designed for use by a single person.
Personal computers are also called microcomputer, because they are among the smallest computers created for people to use. Note, however, that the term personal computer or PC is most often used to describe desktop computers, which you will learn about in the following section. Although personal computers are used by individuals, they also can be connected together to create networks (see Figure) .
In fact, networking has become one of the most important jobs of personal computers, and even tiny handheld computers can now be connected to networks. You will learn about computer networks in , “ Networks."
Desktop Computers:
The most common type of personal computer is the desktop computer a PC that is designed to sit on (or under) a desk or table. These are the systems you sec all around you, in schools, homes, and offices, and they are the main focus of this articles.
Today's desktop computers are far more powerful than those of just a few years ago, and are used for an amazing array of tasks. Not only do these machines enable people to do their jobs with greater ease and efficiency, but they can be used to communicate, produce music, edit photographs and videos, play sophisticated games, and much more. Used by everyone from preschoolers to nuclear physicists, desktop computers arc indispensable for learning, work, and play (see Figure).
Workstations:
A workstation is a specialized, single-user computer that typically has more power and features than a standard desktop PC (see Figure). These machines are popular among scientists, engineers, and animators who need a system with greater-than-average speed and the power to perform sophisticated tasks. Workstations often have large, high-resolution monitors and accelerated graphics handling capabilities, making them suitable for advanced architectural or engineering design, modeling, animation, and video editing.
Notebook Computers:
Notebook computers, as their name implies, approximate the shape of an 8.5-by-ll-inch notebook and easily fit inside a briefcase. Because people frequently set these devices on their lap, they are also called laptop computers. Notebook computers can operate on
alternating current or special batteries. These amazing devices generally weigh less than eight pounds, and some even weigh less than three pounds! During use, the computer’s lid is raised to reveal a thin monitor and a keyboard.
Tablet PCs:
The tablet PC is the newest development in portable, full-featured computers (see Figure). Tablet PCs offer a ll the functionality of a notebook PC, but they are lighter and can accept input from a
special pen called a stylus or a digital pen that is used to tap or write directly on the screen. Many tablet PCs also have a built-in microphone and special software that accepts input from the user's voice. A few models even have a fold-out keyboard, so they can be transformed into a standard notebook PC. Tablet PCs run specialized versions of standard programs and can be connected to a network. Some models also can be connected to a keyboard and a full-size monitor.
Handheld PCs:
Handheld personal computers are computing devices small enough to fit in your hand (see Figure). A popular type of handheld computer is the personal digital assistant (PDA). A PDA is no larger than a small appointment book and is normally used for special applications, such as taking notes, displaying telephone numbers and addresses, and keeping track of dates or agendas. Many PDAs can be connected to larger computers to exchange data.
Most PDAs come with a pen that lets the user write on the screen. Some handheld computers feature tiny built-in keyboards or microphones that allow voice input.
Many PDAs let the user access the Internet through a wireless connection, and several models offer features such as cellular telephones, cameras, music players, and global positioning systems.
Smart Phones:
Some cellular phones double as miniature PCs (see Figure). Because these phones offer advanced features not typically found in cellular phones, they are sometimes called smart phones. These features can include Web and c-mail access, special software such as personal organizers, or special hardware such as digital cameras or music players. Some models even break in half to reveal a
miniature keyboard.
Most PDAs come with a pen that lets the user write on the screen. Some handheld computers feature tiny built-in keyboards or microphones that allow voice input.
Many PDAs let the user access the Internet through a wireless connection, and several models offer features such as cellular telephones, cameras, music players, and global positioning systems.
Smart Phones:
miniature keyboard.
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