Most number base converter applications allow you to convert numbers between the most commonly used numeral systems which include Binary, Decimal, Octal and Hexadecimal. The decimal system is the one that people use in everyday calculations, and binary is only used by 0s and 1s (which are the only numbers that computers recognize). The octal number system has digits 0-7 and was used in some computing applications. Hexadecimal is also a numbering system that includes digits 0-9 and letters A-F that is useful for representing larger binary values in a shorter format. Converting between these bases can be done a lot easier by using a Number Base Converter than doing it individually. There are also some advanced converters that may support other bases, enabling users to operate in specialized numerical systems. They can be used for computer science exercises, programming assignments, learning about different numeral systems and for debugging. Always find out what input and output bases the converter supports before using one.