Since 2017, we at Cerner have been building Terra, a single page web application framework, and accessibility has always been a primary goal. Over the years we’ve learned a lot about how to build and test accessible websites, as well as the diverse group of people we’re serving. With this blog post, we’d like to take a moment to share what we’ve learned so far. Why accessibility matters At Cerner, we build software for many different users in many different roles.