Adobe is planning to offer more details later this month on its Apollo project, designed to run rich Internet applications offline on PCs, its president said in an interview on Thursday.

The Apollo cross-operating system runtime will provide a way for developers to build applications drawing on Adobe technologies including PDF, Flash and Flex, or with JavaScript, AJAX and HTML, in a single environment. It will be released for Windows and Mac OS X. Until now such applications have typically relied on Internet resources and had limited access to local files but Apollo could change that, said Shantanu Narayen, president and chief operating officer of Adobe.

Adobe expects to release Apollo next year, and will give details of the project at its Adobe Max conference in Las Vegas between October 23 and 26, he said.

"Max is coming up in a couple of weeks, which is our annual developer conference and we'll be unveiling more progress about Apollo at that time," said Narayen. "We've been making good progress internally."

"We're not yet laying out the complete roadmap but what we are doing is working with a set of developers to make sure it's right," he said. "Our goal is when it's available in the marketplace as an early beta for people to play with and develop applications, we want to make sure we've already incorporated as much feedback as we can."

He said the early beta release should be available to a limited set of developers this year.