Basic terms for computer

Input
Whatever goes into the computer is called input. For example text, graphic sounds etc. In every day life the example for input is a voting slip in a ballot. Input Devices
An input device is any peripheral (piece of computer hardware equipment) used to provide data and instruction to computer, for example keyboard and microphone. Every day life example is a hand that is used to put the voting slip in a ballot box. Thus hand is input device for ballot box.
Output
Anything that comes out of a computer is called output. For example sound of a playing video in computer is the output. 
output device
An output device is a hardware used to get the output from the computer. For example head phones are output device and used for listening sound in computer.
Processing
Computer is given the data and instruction as input, which is processed to create output in the form of information. Data is a raw form of symbols, numbers, images etc, whereas information is an organized, meaningful and useful form of the data. 
For example, some data (student roll number, name, total marks, obtained marks etc) from the mid exam is entered. Computer process the data, and creates a report of pass and fail students.
This report is more organized and useful for us, and thus information rather than just data.
Storage
Storage, also referred as memory, is the ability of computer to store data, information or instructions. It can save digital data on RAM, hard disks or removable memory.
Storage Devices
Storage devices are used to store data when they are not being used in memory. The most common types are floppy disks, hard disks and CD-ROM and DVD.
Hardware
Hardware refers to the physical elements of a computer. Examples of hardware in a computer are the keyboard, the monitor, the mouse and the processing unit.In contrast to software, hardware is a physical entity, while software is a non-physical entity.
Hardware and software are interconnected, without software; the hardware of a computer would have no function.
Software
How does computer use its hardware? 
The term software refers to programs or sets of instructions that the computer uses to perform computer operations. Software can also be described as a collection of routines, rules and symbolic languages that direct the functioning of the hardware. Software is capable of performing specific tasks, as opposed to hardware which only perform mechanical tasks what they are mechanically designed for.
We can think or write instructions,but can not touch them.
Characteristics of software
Software is intangible (you can not hold it like hardware).
It is weightless.
It does not exist as hardware.
Software is use to operate the computer.

Advantages of computers

1- Efficiency
Machines are more efficient than humans. They can perform millions of calculations with less effort in no time.
2- Reliability
Work done by computer is more reliable than one done by humans. Computers perform according to the instructions given to it that makes output or results produced by these more accurate and reliable. For example, a computer can do millions of error free calculation in less than a second.
3- Storage
Computers give you an advantage of storing large amount of data in one place. For example you can store the data of whole library in one computer.
4- Fast results
Computers are capable of doing many difficult tasks in very short time. Everyday the processing speed of computers is increasing to make them work faster. Latest computers are capable of performing thousands of instructions and calculation in less than a minute which used to take hours with old PCs.

What is computer?

What is computer? 
Computer is an electronic device that takes data, instructions and information as input and
produce output (information) after processing it.
It is a machine that process thousands of instructions in less than a second and produces outputs
as instructed or programmed

Essential Maintenance Tips For Your Computer

The computer is one of the most important inventions to have taken place in the 20th century, which has grown over several decades contributing to the growth and changes in human learning and behavior. Today the computer is an essential part of human life without which they cannot do their day-to-day tasks. This amazing machine has made life easier for most people and contributed to their overall growth. Today almost all household have at least one computer but the most important question that arises here is, if the owner is concerned about the proper maintenance of the machine or not. Most people either fail or forget to properly maintain their computer from both internal and external threats that can seriously jeopardize the functioning of the machine. However, with just a few important tips you can effectively maintain your computer and can keep its functioning as good as ever.

Here are a few essential maintenance tips to keep your computer stable and in a perfect condition:

1. Perform a disk clean up for maintaining the speed of your computer. Running regulardisk clean up can clean your system of unnecessary data. This step can be done manuallyor by running the disk cleanup utility in Windows.

2. Running a registry cleaning software can relieve your system from obsolete and corrupt entries in the registry file. A clogged registry can severely hamper the performance of your system and can even cause it to crash. So, it is important to clean your Windowsregistry at regular intervals.

3. By using an Anti-Spyware program you can clean your system from malicious programs that intend to steal your data and cause your system to clog.

4. Viruses are one of the most common and serious threat to computers and using a good updated Anti-virus program will help your computer to rid itself from harmful viruses.

5. Lastly, you need to clear all un-important software installed on your computer as they cause a lot of trouble during the Windows startup process and make the process a rather clumsy one.

By following these simple steps you can effectively shield your computer from all internal and external threats.