PC (personal computer), the term personal computer comes from IBM's first desktop computer model PC in 1981. Before that, there was the Apple II personal computer.
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A personal computer is composed of a hardware system and a software system. It is a device that can run independently and complete specific functions.
Hardware system: refers to the physical equipment of the computer such as power supply, motherboard, CPU, memory, hard disk, etc.
lSoftware system: refers to a program designed to facilitate the use of computers. Software systems include system software and application software. System software refers to programs mainly used to control and manage computer resources, such as operating systems, compilation systems, etc. Application software refers to various programs that can run in the operating system, such as game software, work software, etc.
Personal computers do not need to share resources such as processing, disks, and printers of other computers and can work independently. From desktop computers (or desktop computers, desktop computers), notebook computers to handheld computers and tablet computers, they all belong to the category of personal computers.
Recently, whether at home or abroad, many "experts" believe that one day in the near future, traditional PCs will be replaced by more portable smartphones and tablets.
Nowadays, there are many types of PCs, some are more powerful and some are more convenient to use.
Desktop
Also called a desktop computer, it is an independent and phase-separated computer. It is larger and cheaper than notebooks and netbooks. It is mainly Components such as: host, monitor, keyboard, mouse, and speakers are generally relatively independent and generally need to be placed on a computer desk or a special workbench. Hence the name desktop, desktop computer. The performance of desktop computers is relatively stronger than that of laptop computers. Desktop computers have the following characteristics:
Heat dissipation: Desktop computers have advantages that notebook computers cannot match. Desktop computer cases have been widely used because of their large space and good ventilation conditions.
Expandability: The desktop chassis is convenient for users to upgrade hardware, such as optical drives, hard drives, and graphics cards. For example, a desktop case has 4-5 optical drive slots and 4-6 hard drive slots. It is very convenient for users to upgrade their hardware in the future.
Protectiveness: The desktop computer protects the hardware from dust in all aspects. And the water resistance is pretty good; not a great development in a laptop.
Clarity: The desktop computer case’s power on, key reset button, USB, and audio interfaces are all on the front panel of the case, making it convenient for users to use.
All-in-one computer (all-in-one)
All-in-one computer is a computer composed of a monitor, a computer keyboard and a mouse. Its chip, motherboard and monitor are integrated together, and the monitor is a computer, so as long as the keyboard and mouse are connected to the monitor, the machine can be used. With the development of wireless technology, the keyboard, mouse and monitor of an all-in-one computer can be connected wirelessly. The machine has only one power cord, which solves the long-criticized problem of desktop computers with many and complicated cables. Some all-in-one computers also have TV reception, AV functions (video output functions), touch functions, etc.
Notebook or Laptop
Also known as laptop computer or laptop computer, it is a small, portable personal computer, usually weighing 1- 6kg. It has a similar architecture to a desktop computer, but provides excellent portability that desktop computers cannot match: including an LCD display, smaller size, and lighter weight. In addition to the keyboard, the laptop also provides a touchpad (TouchPad) or a touch point (Pointing Stick), which provides better positioning and input functions.
Laptop computers can be roughly divided into 6 categories: business type, fashion type, multimedia application, Internet type, learning type, and special purpose. Business laptops can generally be summarized as having strong mobility, long battery life, and many business software; fashionable appearance is mainly aimed at fashionable women; multimedia application laptops have strong graphics, image processing capabilities and multimedia capabilities, especially It is the playback capability and it is an enjoyment product. Moreover, multimedia laptops mostly have relatively powerful independent graphics cards and sound cards (both support high-definition), and have larger screens. Netbooks are lightweight and low-configuration laptops that have functions such as surfing the Internet, sending and receiving emails, and instant messaging (IM), and can smoothly play streaming media and music. Netbooks emphasize portability and are mostly used for mobile Internet access on business trips, tourism and even public transportation. The learning body is designed in the shape of a notebook, uses standard computer operations, and fully integrates multiple machine functions such as learning machines, electronic dictionaries, repeaters, and student computers. Special-purpose laptops are models that serve professionals and can be used in harsh environments such as intense heat, severe cold, low pressure, and war. Some are relatively bulky, such as those used in the "ASUS Everest Base Camp IT Service Area" in the early stages of the Olympic Games. ASUS laptop.
PDA
A handheld computer is a small, lightweight, portable, practical and cheap handheld computing device that runs on an embedded operating system and embedded application software. It is simpler and lighter than a notebook computer in terms of size, function and hardware configuration, but it is far superior to an electronic notebook in terms of function, capacity, scalability, processing speed, operating system and display performance. In addition to managing personal information (such as address books, plans, etc.), handheld computers can also browse the Internet, send and receive emails, and can even be used as mobile phones. In addition, it also has: recorder function, English-Chinese-Chinese dictionary function, global clock comparison function, reminder function, leisure and entertainment function, fax management function, etc. The power supply of handheld computers usually uses ordinary alkaline batteries or rechargeable lithium batteries. The core technology of handheld computers is the embedded operating system, and the competition between various products mainly lies here.
Adding mobile phone functions to a handheld computer becomes a smartphone. In addition to the call function of a mobile phone, a smart phone also has PDA sub-functions, especially personal information management and browser and email functions based on wireless data communication. Smartphones provide users with sufficient screen size and bandwidth, which is not only convenient to carry around, but also provides a broad stage for software operation and content services. Many value-added services can be launched here, such as stocks, news, weather, transportation, commodities, and applications. Program downloads, music picture downloads, etc. Screen size is generally below 6 inches.
Tablet computer (Tablet)
The tablet computer was proposed by Bill Gates. Judging from the tablet computer concept product proposed by Microsoft, the tablet computer is a tablet computer that does not require a flip. Computers that come in different sizes and shapes without keyboards, but are fully functional. Its components are basically the same as those of a laptop, but it uses fingers or a stylus to click on the screen instead of using a keyboard and mouse for input, and breaks the J-shaped design pattern of laptop keyboards that are perpendicular to the screen. It supports handwriting input or voice input. Its mobility and portability are better than notebook computers. It supports chip architectures from Intel, AMD and ARM, and the screen size is generally above 7 inches.
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