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learnability:This design uses a lot of buttons and tabs for navigation. Both of these have intuitive text labels that tell the user what they do. This makes it easier for a user to understand than if they are unfamiliar with the program's abilities and icon. Organizationally, the tabs separate different types of buttons, and therefore break up the functionality of the website into digestible segments for the user. the visibility, efficiency, and error preventionThe site also draws from the ribbon design that is applied by many programs such as Microsoft Word and Maya. However, this program does not support quite as many options as Microsoft Word or Maya, so implementing the ribbon design may be overkill. It may be easier to understand and efficiently navigate the site if more options were presented in the opening toolbar and spaced around the site. One successful user interface that does this is Gmail. The chat, tags, and mail creator are all in the same place.