Parts of Computer: 

Any kind of computers consists of HARDWARE AND SOFTWARE. 

Hardware: 

Computer hardware is the collection of physical elements that constitutes a computer system. Computer hardware refers to the physical parts or components of a computer such as the monitor, mouse, keyboard, computer data storage, hard drive disk (HDD), system unit (graphic cards, sound cards, memory, motherboard and chips), etc. all of which are physical objects that can be touched.

parts of Hardware

Example of computer HARDWARE:

1. KEYBORD
2. MOUSE
3. CPU
4. MOTHER BOARD
5. MONITER

Software:

Software is a generic term for organized collections of computer data and instructions, often broken into two major categories: system software that provides the basic non-task-specific functions of the computer, and application software which is used by users to accomplish specific tasks.

Software Types:

A. System software:

System software is responsible for controlling, integrating, and managing the individual hardware components of a computer system so that other software and the users of the system see it as a functional unit without having to be concerned with the low-level details such as transferring data from memory to disk, or rendering text onto a display. Generally, system software consists of an operating system and some fundamental utilities such as disk formatters, file managers, display managers, text editors, user authentication (login) and management tools, and networking and device control software.

B. Application software:

Application Software is used to accomplish specific tasks other than just running the computer system. Application software may consist of a single program, such as an image viewer; a small collection of programs (often called a software package) that work closely together to accomplish a task, such as a spreadsheet or text processing system; a larger collection (often called a software suite) of related but independent programs and packages that have a common user interface or shared data format, such as Microsoft Office, which consists of closely integrated word processor, spreadsheet, database, etc.; or a software system, such as a database management system, which is a collection of fundamental programs that may provide some service to a variety of other independent applications.

Comparison Application Software and System Software:

System Software:

Computer software, or just software is a general term primarily used for digitally stored data such as computer programs and other kinds of information read and written by computers. App comes under computer software though it has a wide scope now.

Example:

1) Microsoft Windows
2) Linux
3) Unix
4) Mac OSX
5) DOS

Interaction:

Generally, users do not interact with system software as it works in the background.

Dependency:

System software can run independently of the application software.

Application Software:

Application software, also known as an application or an "app", is computer software designed to help the user to perform specific tasks.

Example:

1) Opera (Web Browser)

2) Microsoft Word (Word Processing)

3) Microsoft Excel (Spreadsheet software)

4) MySQL (Database Software)

5) Microsoft PowerPoint (Presentation Soft

Interaction:

Users always interact with application software while doing different activities.

Dependency:

Application software cannot run without the presence of the system software.

Characteristics of Computer

 Characteristics of Computer 

Speed, accuracy, diligence, storage capability and versatility are some of the key characteristics of a computer. A brief overview of these characteristics are 

• Speed:

 The computer can process data very fast, at the rate of millions of instructions per second. Some calculations that would have taken hours and days to complete otherwise, can be completed in a few seconds using the computer. For example, calculation and generation of salary slips of thousands of employees of an organization, weather forecasting that requires analysis of a large amount of data related to temperature, pressure and humidity of various places, etc. 

• Accuracy: 

Computer provides a high degree of accuracy. For example, the computer can accurately give the result of division of any two numbers up to 10 decimal places. 

• Diligence: 

When used for a longer period of time, the computer does not get tired or fatigued. It can perform long and complex calculations with the same speed and accuracy from the start till the end. 

• Storage Capability: 

 Large volumes of data and information can be stored in the computer and also retrieved whenever required. A limited amount of data can be stored, temporarily, in the primary memory. Secondary storage devices like floppy disk and compact disk can store a large amount of data permanently. 

• Versatility:

Computer is versatile in nature. It can perform different types of tasks with the same ease. At one moment you can use the computer to prepare a letter document and in the next moment you may play music or print a document. Computers have several limitations too. Computer can only perform tasks that it has been programmed to do.

Introduction of computer

Introduction of Computer:-

A computer is a programmable machine designed to perform arithmetic and logical operations  automatically and sequentially on the input given by the user and gives the desired output after

 processing. Computer components are divided into two major categories namely hardware and

software. Hardware is the machine itself and its connected devices such as monitor, keyboard, 

mouse etc. Software arethe set of programs that make use of hardware for performing various 

functions.

Functionalities of a computer:-

Any digital computer carries out four functions in gross terms they are:

• Takes data as input.
• Stores the data/instruction in its memory and use them when required.
• Processes the data and converts it into usefull information.
• Generates the Output.

• 

  processing of computer