1. Hardware: It is the collection of all the parts you can physically touch.
2. Software: It is a set of programs that govern the operation of a computer system and its related devices.
3. System Software: This controls all internal activities of a computer system and also the ones between allthe attached components of a computer system.
4. Application Software: It enables the users to complete their specific tasks.
5.General Purpose Computers: These computers are used for general computing purposes.
6.Special Purpose Computers: These are used for a specific application,
7.Programming Language: It is a set of commands, instructions, and other syntax used to create a software program.
8.Machine Language: The language which is composed of 0’s and 1
9.Assembly Language: This language uses simple English words known as Mnemonic codes.
10.Assembler: It is used to convert the input by the Assembly Level Language into Machine Language.
11.High Level Language: This is like everyday text and mathematical formulas in appearance.
12.Interpreter: It converts a high level language program into Machine Language line by line.
13.Compiler: It converts the entire program written in High Level Language into Machine Language in one go.
14.Fourth Generation Languages: These languages are user friendly and easily understood.
15.Fifth Generation Languages: These languages are very close to languages spoken by human beings.