The Fission Theory: This theory proposes that the Moon was once part of the Earth and somehow separated from the Earth early in the history of the solar system.
This provides modular approach to programming. Classes. A class is a concept used in object oriented programming languages such as C++, PHP, and JAVA etc. Apart from holding data, a class is also used to hold functions. An object is an instant of a class. In case of variables, the type is the class whereas the variable is the object.
A class is those who share common economic interests, are conscious of those interests, and engage in collective action which advances those interests. Within Marxian class theory, the structure of the production process forms the basis of class construction. To Marx, a class is a group with intrinsic tendencies and interests that differ from those of other groups within society, the basis of a fundamental antagonism between such groups.