Computer works with binary number system that is consist of only two digits zero and one. Inside the computer binary number is represented by an electrical pulse. One means a pulse of electricity and zero means no pulse. All the data enters into the computers first converts into the binary number system. One digit in binary number system is called bit and combination of eight bits is called byte. A byte is the basic unit that is used to represent the alphabetic, numeric and alphanumeric data.

Data is the combination of characters, numbers and symbols collected fro a specific purpose. Data is divided into three types; alphabetic data, numeric data and alphanumeric data. Numeric data consist of ten digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, two signs + and – and decimal point . There are different types of number system that are used to represent numeric data. These number systems are decimal number system, binary number system, octal number system and hexadecimal number system.

Alphabetic data is used to represent 26 alphabetic. It consist of capital letters from A to Z, small letters from a to z and blank space. Alphabetic data is also called non numeric data. Alphanumeric data used to represent alphabetic data, numeric data, special character and symbols.

Data is the combination of characters, numbers and symbols collected fro a specific purpose. Data is divided into three types; alphabetic data, numeric data and alphanumeric data. Numeric data consist of ten digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, two signs + and – and decimal point . There are different types of number system that are used to represent numeric data. These number systems are decimal number system, binary number system, octal number system and hexadecimal number system.

Alphabetic data is used to represent 26 alphabetic. It consist of capital letters from A to Z, small letters from a to z and blank space. Alphabetic data is also called non numeric data. Alphanumeric data used to represent alphabetic data, numeric data, special character and symbols.