Today in the age of electronic revolution computer has become an integral part of our life. We can say that computers have entered each and every walk of life be at home at work or at school. Most of our daily activities either involve the use of computer or depend upon the information derived from computer.
With a computer at home you can check your bank account, pay bills, transfer funds, sell or buy products etc. At the grocery shop a computer track your purchases and calculate the amount of your owe.
many schools colleges and homes have computer for educational purpose student complete assignments and do research on computer in computer Labs.
Computer have became a source of entertainment. You can play games, listen music, is watch of video or movie, read a book or a magazine, composed a video, plan vacation and do many more things.
to be successful in this digital world it has become essential that you must be computer literate being computer literate mean you have the knowledge and understanding the computers and their uses.
Benefits of using a computer
Speed: a computer allows you to perform many tasks very fast.
Quality: computer enables you to create high-quality document and drawing.
Reliability: a computer is reliable and accurate. Computer never make mistake by itself.
Storage capability:a computer can store enormous amount of data and make this data available for processing at any point of time when it is needed.
Versatility: a computer can perform repetitive jobs efficiently. It can work in the areas where the human brain cannot manage.
A computer works very fast and accurately. Computer does four main functions. It inputs data, processes it,display the output from the data as information and finally stores it.
Computer memory
Memory plays a very important role in a computer. It is the basic unit where data and instructions are stored temporarily. Memory usually consists of one or more chips on the motherboard. Memory stores instruction waiting to be executed by the processor, data needed by those instructions and the result of processing the data.
Computer process and stored data and instructions in the form of two digits 0 and 1.These digits are called the binary digits or bits.abate is the smallest unit of information that computer can process and store. A group of 4 bits is known as nibble and a group of 8 bits is called byte. A byte is the minimum space required to store a character.
Computer memory is basically divided into two types-primary memory and secondary memory.
Primary memory: it is often known as the working memory on the main memory of a computer system. Primary memory is of two types-volatile and non- volatile memory. When the computer power is turned off volatile memory loses its contents.non volatile memory in construct does not lose its contents when the computer is turned off. RAM and ROM are two major types of primary memory. They are made up of many semiconductor material a computer cannot run without primary memory.
Secondary memory: it is used to store data for a long time. It operates at a slower rate than primary memory. This memory is permanent in nature data is store is not lost even when the computer is switched off. So it is known as non volatile memory. It is also known as backup memory. Example of secondary memory are-hard disk, compact disc, pen drive etc.
Computer recognise only two discrete States: on and off.this is because computer electronic devices powered by electricity which also has only two States: on or off.
computer project 