Progressive Aviation offers universal accessibility. 

Using the Internet,  we open business processes to customers, partners, and suppliers without requiring proprietary access software or hardware.  The key to successful e-business applications is the ability to provide your users with access to whatever they need to get their jobs done efficiently; that means allowing them to access your applications from a variety of clients and devices. This requires the capability to easily present your information in a variety of ways. Application accessibility is a cornerstone of the Progress database e-business platform.  Access is possible with a graphical user interface, HTML interfaces running in Web browsers or on PDAs.

See all the accessibility options that Progress Aviation supports at work in “Opening Your Doors to the Internet:  Customer Accessibility for E-Business Applications".