He is responsible for the editorial direction of the magazine, development of stories and the expansion of its web site, onmagazine.com. ON was relaunched in February 2001 with a circulation of 1 million, plus new members of America Online. TIME Digital was first launched in 1995, inside TIME magazine, and later increased frequency and became a standalone newsstand title.

Quittner also writes a weekly column in the "Personal Time" section entitled "Your Technology," which combines practical advice with engaging personal stories. It has become one of TIME's most popular features and has already made an impact on the industry since its debut in 1998. A column on the Diamond Multimedia Rio Internet music device predicting "the death of the music industry" led to a lawsuit against Diamond by the Recording Industry of America (which the industry subsequently lost). Another column praised Sonic Foundry's new music program as "the most fun software I saw at Comdex" and led to a run on the company's stock.

Quittner was named one of top 20 most influential technology journalists two years in a row by ADWEEK's Technology Marketing magazine. He also anchors "TIMETech," a daily 60-second technology report distributed by CBS Radio Network. Quittner advises listeners on where to go, what to do, and how to do it on the Web. Topics include the online bargain of the day and reviews of latest digital products.

Quittner has also co-written a number of books with his wife, Michelle Slatalla, a contributor to TIME's "Personal TIME" section and author of a weekly computer column called "User's Guide" for The New York Times' "Circuits" section. Their joint works include a nonfiction account of a group of teenage hackers called Masters of Deception: The Gang That Ruled Cyberspace (William Morrow & Co., 1997); Flame Wars: A Cyberthriller (HarperCollins 1995); and most recently, Speeding the Net: The Inside Story of Netscape and How It Challenged Microsoft (Atlantic Monthly Press, 1998).

Quittner joined TIME in January 1995 as a staff writer from Newsday, where he created the weekly "Life in Cyberspace" column. In November 1995 he moved to Pathfinder, Time Inc.'s pioneer online site, where he founded The Netly News, a daily feed on digital news and culture. Before joining Newsday, Quittner had worked at the Bergen Record in New Jersey and the Albuquerque Journal.

A graduate of Grinnell College and the Columbia School of Journalism, he currently resides in Long Island with his wife and three daughters.