What makes Dragon Go a bit different is the fact that the new iPhone app often knows what to do with a specific query. Say “Play R.E.M.” and it opens Pandora. Say “buy tickets for Bridesmaids” and it will open Fandango. But say “Reviews for Bridesmaids” and it will open IMDB instead. Meanwhile, asking for a review of a restaurant should bring up Yelp while a query for reservations for that same restaurant polls OpenTable.

Nuance, which created the free app, has built an open architecture aimed at including all manner of vertical queries. At launch it supports more than 180 options from the aforementioned sites to services such as Yelp, Wikipedia and Google. And Nuance expects that number will continue to grow.

“We’ll see what kinds of things that people are interested in that maybe we didn’t anticipate,” Chief Creative Officer Gary Clayton said in a recent interview.

It’s the latest iPhone app from Nuance, which also offers the Dragon Dictation transcription program and Dragon Search, a more generic voice search application.

I played with Dragon Go some this week. It’s pretty easy and works much of the time, but the promotional video below overstates things a bit. The app can be amazingly adept at searching what one wants much of the time, but there are certainly times where it simply does a Google search for something close to — but not exactly — what one is searching for.

Before John Lilly got the CEO job at Mozilla Corporation, I had visited the HQ of the the open-source software nonprofit foundation and also a for-profit start-up–famous for its increasingly popular Firefox browser (logo pictured here) and red dragon logo–on Landings Drive in Mountain View.

I toured the place and took video note of a freakishly large sculpture made of soda cans and the biggest couch I have ever seen. In other words, just another typical Silicon Valley company.

Here’s an inside look at Mozilla HQ:

Here are a few questions about computers I’ve received recently from people like you, and my answers. I have edited and restated the questions a bit, for readability. This week my mailbox contained questions about speech-recognition software for Macs, whether Windows Media Player will play video files from iTunes, and if Vista is worth the wait.

If you have a question, send it to me at mossberg@wsj.com, and I may select it to be answered here in Mossberg’s Mailbox.

I have an iPod which uses iTunes software on my Windows computer. With the iTunes software comes QuickTime. I do not want QuickTime to play video files. I wish to use Windows Media Player as the default player. Must I use QuickTime as a video player in order to use iTunes for music?

No. QuickTime is an Apple program that is required by iTunes, even on Windows computers. It can also be used on its own to play some video and audio files. But, if you set its preferences so it isn’t the default player for various types of video files, and you set Windows Media Player as the default, you should be able to use the latter, as in the past. There is one exception: If you purchase videos from Apple’s iTunes Music Store, you can only play them in either iTunes or QuickTime, not Windows Media Player.

Before we buy our daughter a laptop for school, should we wait until the new Microsoft operating system is released next year? If not, should we buy a laptop with a more powerful chip with the intention of upgrading once it is available?

It depends on when she needs the computer. If she can wait until January, when the new Windows Vista will be available preloaded on laptops, then wait. Vista should have significant advantages over Windows XP in the areas of security and user interface.

However, if she needs it now, you may be able to get a laptop that can be upgraded later to Vista. The trick is that Microsoft hasn’t yet published the specs for a laptop that can be upgraded to Vista. My best advice would be to buy the most powerful processor you can afford, a full gigabyte of memory, and a video system that is called “discrete,” rather than “integrated,” with as much dedicated video memory as possible.

I’ve been using the Dragon Naturally Speaking speech-recognition software on my Windows PC at work. Is there a comparable product for the Mac I use at home?

Yes. There are at least two speech-recognition programs for the Mac. One is IBM’s Via Voice (www.nuance.com/viavoice/osx/) and the other is called Mac Speech (www.macspeech.com/). I haven’t tested them, so I can’t say how they compare with Dragon on Windows, or which is best.