of several disability laws and requires federal agencies to develop, maintain, and use their information and communications technology (ICT) accessible to people with disabilities, regardless if they work for the federal government or not. Section 508 also implies that any people with disabilities applying for a federal government job or any person using the website to get general information about a program or completing an online form has access to the same information and resources that are obtainable by anyone. Accessibility can be implemented by making sites that can present information through multiple sensory channels with sound and sight. The strategic multi-sensory approach and a multi-interactivity approach allows disabled users to access the same information as nondisabled users. This allows for additional means of site navigation and interactivity beyond the typical point-and-click-interface: keyboard-based control and voice-based navigation. Accessibility is very valuable because it ensures that all potential users, including people with disabilities have a good user experience and can easily access information. Overall, it improves usability for all people that use a site. Some of the best practices for accessible content include: Not relying on color as a navigational tool or as the only way to differentiate items Images should include "alt text" in the markup/code and complex images should have more extensive descriptions near the image (caption or descriptive summaries built right into a neighboring paragraph) Functionality should be accessible through mouse and keyboard and be tagged to work with voice-control systems Transcripts should be provided for podcasts Videos on your site must provide visual access to the audio information through in-sync captioning Sites should have a skip navigation feature Consider 508 testing to assure your site is in compliance User Interface Modeling Cognitive task analysis Cognitive task analysis is a general term for the set of methods used to identify the mental demands and cognitive skills needed to complete a task. Frameworks like GOMS provide a formal set of methods for identifying the mental activities required by a task and an artifact, such as a desktop computer system. By identifying the sequence of mental activities of a user engaged in a task, cognitive ergonomics engineers can identify bottlenecks and critical paths that may present opportunities for improvement or risks (such as human error) that merit changes in training or system behavior. It is the whole study of what we know, how we think, and how we organize new