It is also a single user computer system, similar to personal computer however has a more powerful microprocessor. Workstations generally come with a large, high-resolution graphics screen, large amount of RAM, inbuilt network support, and a graphical user interface. Most workstations also have mass storage device such as a disk drive, but a special type of workstation, called disk-less workstation, comes without a disk drive.3. Mini Computer:- It is a multi-user computer system, capable of supporting hundreds of users simultaneously. A minicomputer is a computer which has all the features of a large size computer, but its size is smaller than those. A minicomputer lies between the mainframe and the microcomputer because its size is smaller than the former one and larger than the latter one. A minicomputer is also called as a mid-range computer. Show
It is a multi-user computer system, capable of supporting hundreds of users simultaneously. Software technology is different from minicomputer. Mainframe is very large in size and is an expensive computer capable of supporting hundreds or even thousands of users simultaneously. Mainframe executes many programs concurrently and supports many simultaneous execution of programs. 5. Supercomputer:-It is an extremely fast computer, which can execute hundreds of millions of instructions per second. For example, weather forecasting, scientific simulations, (animated) graphics, fluid dynamic calculations, nuclear energy research, electronic design, and analysis of geological data (e.g. in petrochemical prospecting). Being a modern-day kid you must have used, seen, or read about computers. This is because they are an integral part of our everyday existence. Be it school, banks, shops, railway stations, hospital or your own home, computers are present everywhere, making our work easier and faster for us. As they are such integral parts of our lives, we must know what they are and how they function. Let us start with defining the term computer formally. The literal meaning of computer is a device that can calculate. However, modern computers can do a lot more than calculate. Computer is an electronic device that receives input, stores or processes the input as per user instructions and provides output in desired format. Input-Process-Output ModelComputer input is called data and the output obtained after processing it, based on user’s instructions is called information. Raw facts and figures which can be processed using arithmetic and logical operations to obtain information are called data. The processes that can be applied to data are of two types −
The corresponding figure for an actual computer looks something like this − The basic parts of a computer are as follows −
Control unit, arithmetic logic unit and memory are together called the central processing unit or CPU. Computer devices like keyboard, mouse, printer, etc. that we can see and touch are the hardwarecomponents of a computer. The set of instructions or programs that make the computer function using these hardware parts are called software. We cannot see or touch software. Both hardware and software are necessary for working of a computer. Characteristics of ComputerTo understand why computers are such an important part of our lives, let us look at some of its characteristics −
Advantages of Using ComputerNow that we know the characteristics of computers, we can see the advantages that computers offer−
Disadvantages of Using ComputerDespite so many advantages, computers have some disadvantages of their own −
BootingStarting a computer or a computer-embedded device is called booting. Booting takes place in two steps −
The first program or set of instructions that run when the computer is switched on is called BIOS or Basic Input Output System. BIOS is a firmware, i.e. a piece of software permanently programmed into the hardware. If a system is already running but needs to be restarted, it is called rebooting. Rebooting may be required if a software or hardware has been installed or system is unusually slow. There are two types of booting −
Block diagram of a computer gives you the pictorial representation of a computer that how it works inside. Or you can say that, in computer’s block diagram, we will see how computer works from feeding the data to getting the result. Here is the block diagram of a computer system: In the above diagram, both control (control unit or CU) and arithmetic & logic unit (ALU)combinely called as Central processing unit(CPU) Let’s describe about all the parts as included in the above diagram one by one. The Processor Unit (CPU)It is the brain of the computer system. All major calculation and comparisons are made inside the CPU and it is also responsible for activation and controlling the operation of other unit. This unit consists of two major components, that are arithmetic logic unit (ALU) and control unit (CU). Arithmetic Logic Unit (ALU)Here arithmetic logic unit performs all arithmetic operations such as addition, subtraction, multiplication and division. It also uses logic operation for comparison. Control Unit (CU)And the control unit of a CPU controls the entire operation of the computer. It also controls all devices such as memory, input/output devices connected to the CPU. CU fetches instructions from memory, decodes the instruction, interprets the instruction to know what the task are to be performed and sends suitable control signals to the other components to perform for the necessary steps to executes the instruction. Input/Output UnitThe input/output unit consists of devices used to transmit information between the external world and computer memory. The information fed through the input unit is stored in computer’s memory for processing and the final result stored in memory can be recorded or display on the output medium. Memory UnitMemory unit is an essential component of a digital computer. It is where all data intermediate and find results are stored. The data read from the main storage or an input unit are transferred to the computer’s memorywhere they are available for processing. This memory unit is used to hold the instructions to be executed and data to be processes. Disk Storage UnitData and instruction enters into a computer system through input device have to stored inside the computer before actual processing start. Two types of storage unit are primary and secondary storage unit. Primary Storage UnitPrimary memory has direct link with input unit and output unit. It stores the input data, calculation result. Secondary Storage UnitThe primary storage is not able to store data permanently for future use. So some other types of storage technology is required to store the data permanently for long time, it is called secondary or auxiliary storage. Computers can be broadly classified by their speed and computing power.S.No.TypeSpecifications1PC (Personal Computer)It is a single user computer system having moderately powerful microprocessor2WorkstationIt is also a single user computer system, similar to personal computer however has a more powerful microprocessor.3Mini ComputerIt is a multi-user computer system, capable of supporting hundreds of users simultaneously.4Main FrameIt is a multi-user computer system, capable of supporting hundreds of users simultaneously. Software technology is different from minicomputer.5SupercomputerIt is an extremely fast computer, which can execute hundreds of millions of instructions per second. PC (Personal Computer)A PC can be defined as a small, relatively inexpensive computer designed for an individual user. PCs are based on the microprocessor technology that enables manufacturers to put an entire CPU on one chip. Businesses use personal computers for word processing, accounting, desktop publishing, and for running spreadsheet and database management applications. At home, the most popular use for personal computers is playing games and surfing the Internet. Although personal computers are designed as single-user systems, these systems are normally linked together to form a network. In terms of power, now-a-days high-end models of the Macintosh and PC offer the same computing power and graphics capability as low-end workstations by Sun Microsystems, Hewlett-Packard, and Dell. WorkstationWorkstation is a computer used for engineering applications (CAD/CAM), desktop publishing, software development, and other such types of applications which require a moderate amount of computing power and relatively high quality graphics capabilities. Workstations generally come with a large, high-resolution graphics screen, large amount of RAM, inbuilt network support, and a graphical user interface. Most workstations also have mass storage device such as a disk drive, but a special type of workstation, called diskless workstation, comes without a disk drive. Common operating systems for workstations are UNIX and Windows NT. Like PC, workstations are also single-user computers like PC but are typically linked together to form a local-area network, although they can also be used as stand-alone systems. MinicomputerIt is a midsize multi-processing system capable of supporting up to 250 users simultaneously. MainframeMainframe is very large in size and is an expensive computer capable of supporting hundreds or even thousands of users simultaneously. Mainframe executes many programs concurrently and supports many simultaneous execution of programs. SupercomputerSupercomputers are one of the fastest computers currently available. Supercomputers are very expensive and are employed for specialized applications that require immense amount of mathematical calculations (number crunching). Is a singleComputers can be broadly classified by their speed and computing power.
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Computer Graphics.. Which computer is used by a singlePersonal computer (PC) – a small computer designed for use by a single user at a time. A PC or microcomputer uses a single chip (microprocessor) for its central processing unit (CPU).
Is a small singleA microcomputer is a complete computer on a small scale, designed for use by one person at a time. An antiquated term, a microcomputer is now primarily called a personal computer (PC), or a device based on a single-chip microprocessor. Common microcomputers include laptops and desktops.
What are the types of computer system?Types of Computer. Mainframe Computer. It is high capacity and costly computer. ... . Super Computer. This category of computer is the fastest and also very expensive. ... . Workstation Computer. ... . Personal Computer (PC) ... . Apple Macintosh (Mac) ... . Laptop computer (notebook) ... . Tablet and Smartphone.. |