While most people know Flash as primarily a multimedia delivery and development technology for Web sites, it is catching on as a front-end user-interface (UI) technology for business applications, an Adobe manager said Wednesday.

With Microsoft pushing its Silverlight technology as an alternative to Flash on the Web, Adobe has been promoting the use of Flash and its development framework, Flex, as well as the Adobe Integrated Runtime (AIR) -- a companion technology that brings Web-based Flash applications to the desktop -- for use among businesses.

This deployment of a technology whose primary domain has been mostly consumer-facing Web applications is encroaching on the territory long owned by Microsoft and other enterprise software and development-tool vendors.

Adobe's Flash has been making progress against legacy desktop applications -- such as those built in C++ -- although that progress hasn't been widely publicized, said Adrian Ludwig, a group manager at Adobe Systems.

"One of the problems with Flash is people only think of it as being used to do public Web sites," he said in an interview in New York Wednesday. "It's a misconception. A significant percentage of [Flash] applications people are making now are enterprise applications behind the corporate firewall."

He cited as an example an application that Siemens and development partner Thrasys created for Siemen's health information system. The companies created a front-end, Web-based interface using Flash and Flex to unite several back-end applications and streamline how employees use information from different systems.

"Rather than pulling out the back end and starting from scratch, they just replaced the UI," Ludwig said.

Adobe also is using Flex and AIR internally in similar scenarios to unite back-end systems through a front-end interface, said Melissa Webster, program vice president for research firm IDC.

In a recent meeting with Adobe, she said the company showed how it is "eating its own dog food" and using AIR -- which can help bring Flash-based Web applications to the desktop -- as the UI for its own internal applications. The company opted to use AIR for these interfaces instead of Flash so employees can run the applications locally when they are not connected to the Internet, Webster said.

The IDG News Service is a Network World affiliate.