The HCI for Microsoft Word is feature-rich and user-friendly. It has tabs across the top that define different functionality sets and ribbons directly below the tabs that display the numerous features respectively. This makes it easy to switch from one function to another easily. The HCI for Microsoft Visio is very similar in that it has tabs at the top and displays the appropriate ribbon of editing features that are available. The HCI is important to all users because between the two programs, the HCI was designed to be similar and familiar to users. The use of tabs and ribbons in each program is crucial for a consistent user experience and especially helpful to new users learning to use the software for the first time.