(ii) what is computer ?explain uses of personal computer model.
Answers
personal computer is a general-purpose, cost-effective computer that is designed to be used by a single end-user. ... Businesses make use of PCs to perform tasks like accounting, desktop publishing and word processing as well as to run database and spreadsheets.
Computer is an electronic device which is capable of receiving information (data) in a particular form and of performing a sequence of operations in accordance with a predetermined but variable set of procedural instructions (program) to produce a result in the form of information or signals.
Computers give us access to many sources of knowledge. They are helpful for word processing, Internet communications, digital/audio compositions and also desktop publishing. The computer is definitely a valued piece of technology that has worked its ways into many homes and businesses around the world. The information-processing capabilities of computers have added to their usage.
A computer is a machine that accepts data as input, process that data using programs, and output the processed data. Many computers can store and retrieve information using hard drives. Computers can be connected together to form networks, allowing connected computers to communicate with each other.
The two principal characteristics of a computer are: It responds to a specific instruction set in a well-defined manner and it can execute a prerecorded list of instructions (a program). There are four main processing steps in a computer: inputting, storage, outputting and processing.
Modern computers can do billions of calculations per second. Computers do many different jobs where automation is useful. Some examples are controlling traffic lights, vehicle computers, security systems, washing machines and digital televisions.
Computers can be designed to do almost anything with information. Computers are used to control large and small machines which in the past were controlled by humans. Most people have used a personal computer in their home or at work. They are used for things such as listening to music, reading the news and writing.
Modern computers are electronic computer hardware. They do mathematical arithmetic very quickly but computers do not really "think". They only follow the instructions in their software programs. The software uses the hardware when the user gives it instructions, and gives useful output.
Humans control computers with user interfaces. Input devices include keyboards, computer mice, buttons, and touch screens. Some computers can also be controlled with voice commands, hand gestures or even brain signals through electrodes implanted in the brain or along nerves.
Computer programs are designed or written by computer programmers. A few programmers write programs in the computer's own language called machine code. Most programs are written using a programming language like C++, Java, and Fortran. These programming languages are more like the language with which one talks and writes every day. The compiler translates the user's instructions into binary code (machine code) that the computer will understand and do what is needed.
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