In 1974, Liskov and Zilles defined a strongly typed language as one during which “whenever an item is handed from a calling function programming help a referred to as feature, its type needs to be compatible with laptop science help type declared in desktop technology help called function. “In 1977, Jackson wrote, “In a strongly typed language each data area can have a distinct type and every method will state its verbal exchange requirements in terms of these types. “In contrast, a weakly typed language may produce unpredictable results or may perform implicit type conversion. In object oriented languages type security is typically intrinsic in computer technology help proven fact that a kind system is in place. This is expressed in terms of class definitions. A class virtually defines computing device science help structure of computing device technology help gadgets derived from it and an API as a contract for dealing with these objects.