In this lecture, the object oriented scripting language AppleScript are mainly studied. Because Python language that has been learned in the previous lecture classes, the main target of this lecture is to follow up developing the ability of basic programming with communicating with applications. Using AppleScript and its standard libraries, students studies the paradigm of inter-application programming, especially using the additional numeric libraries. The style of lecture is to the discipline of the typing keys of keyboard according to program coding, and to the practice of making programs.