On August 29, 2013, the US Patent & Trademark Office published a patent application from Apple that reveals a new and elaborate collaboration system for videoconferencing that could be useful for the enterprise or for future distant leaning applications. The system introduces new interactive pie menus that will work with a sophisticated pen that will include memory and other advanced functions. Apple notes that as the pen advances toward the menu presented on a large presentation screen, an opening will automatically be created in the menu so that no content is covered by the presenter's hand or arm. Additionally, Apple notes that the new menu system will work with custom applications designed for this system yet also work with traditional software such as Photoshop, PowerPoint, and other common applications. Apple must think this is an important invention considering that this is a follow-up application to their already granted patent issued back in March.