Definition   A COMPUTER is a general purpose machine which can be made to act like a special purpose machine by means of a program.

Definition   A JAVA APPLICATION TEMPLATE is a text which is a Java program except for ``slots'' which must be ``filled.'' These templates contain five textual sections

• General Information
  
• Application description
  
• Required packages
  
• Application class
  
• Demo
  

Definition   OBJECT-ORIENTED PROGRAMMING is a style of programming which features the modeling of objects in a hierarchal fashion and the sending of messages to appropriately behaving objects.

Definition   A MESSAGE SEND is a construct of the form < object >.   < message > which tells the computer to ``send the message to the object (which knows how to process it) .''

Definition   A VARIABLE is a name (identifier) which represents some concept and which may denote a value.

Definition   A VARIABLE DECLARATION is the introduction of a variable into the program which specifies the type of value which the variable can denote.