Based on the practice for many years on developing the information technology teaching material in elementary and middle Schools,the author puts forward an idea of task actuation in the teaching material developing process,and points out eight aspects while designing the tasks,which lays a foundation for the further forming of the "task" section theory.

A task module in WLONCS is a program module to carry out some control functions, which can run independently in the operating system.

A brief analysis on managerial state of operative segments of Aluminum Co.of America(Alcoa);