Object
The term Object is used to mean a collection of attributes that represent either a physical or logical artifact. For example an Object can represent all the information required for an item or a drawing. The key feature of an Object is that it represents data that can be manipulated as a group, so copying an item Object copies all the attributes associated with the object in one action. Objects are specialized into Classes. An object representing a particular type of bolt, for example, could be in the Class of Objects called bolts. Objects have 'methods'. Methods are ways in which the object can be accessed, modified, displayed, etc. Another feature of Objects is inheritance. One class can be based upon another, the new class is called a subclass. The new class will inherit all the attributes of the other class. So you could have a class called bolt with attributes, length, thread type and pitch. You can then create a subclass called brass. The new class would inherit the attributes length, thread type and pitch from the bolt class and have a new attribute 'brass'.
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