The design of PDHengineer.com is optimized for the Google Chrome series of web browsers. But, the functionality of the website, including creating a login account, purchasing courses, taking quizzes, etc., works with any web browser. However, there are some text and graphics that may appear slightly different than our web designers intended when displayed on your screen if you use a web browser other than Chrome or when viewing the site from a mobile device due to the smaller screen size.