Control Strip Summary: The Control Strip is a control panel that provides the operating environment for Control Strip modules. It runs on any Macintosh PowerBook computer with System 7.0 or later. We discuss Control Strip modules and how to write a new module. This information originally appeared in the PowerBook 520, 520c, 540, 540c Developer Note. It is being published as a Technical Note for ease of access. The information in the PowerBook 520, 520c, 540, 540c Developer Note is obsolete. All future updates to this documentation will happen within this Technical Note. MacCalendar is a complete snippet that illustrates how to write a module for the Control Strip Manager that is available for PowerBook Macintoshes.