Computer destiny

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The compact disc, the computer age's last nod to the notion of an archive that you can hold in your hand, seems to be spinning toward oblivion.

The debut of Apple's MacBook Air, which has no disk drive, could mark the beginning of the end for the CD and usher in an era when all is online.

"Customers don't need internal disk drives; they just think they do," said Leander Kahney, author of the upcoming book "Inside Steve's Brain."

From Apple's release of the original IMac in 1998, it began to dawn on the computer industry that the traditional floppy disk was on a death march.

Fast forward a decade to the debut of the MacBook Air, the laptop that Apple calls "the world's thinnest," and the first thing some consumers notice is the missing disk drive.

"The MacBook Air is exactly analogous to the original IMac," Mr. Kahney said. "There were howls of outrage from customers, and some pundits said the absence of a floppy drive would doom the IMac." Apple Chief Executive Officer Steve Jobs was even uncertain about the move, said an ex-Apple engineer with whom Mr. Kahney spoke. The IMac, however, went on to become the best-selling computer of all time Mr. Kahney said.

"I don't think Apple is convincing anyone that they need to get rid of their optical drive," said Ryan Block, the editor in chief of Engadget, a Web magazine featuring daily coverage of electronics. "There's no substitution for it."

Tom Krazit, author of the Apple blog One More Thing for CNET News, said that "the IMac was a little more daring at the time, since people were still using lots of disk drives and the Internet was not nearly as pervasive." Mr. Block said that when Apple dropped the floppy drive from the IMac it was sending a message that computer users needed to "let go of the past."

This time, Mr. Block said, the company is ditching the familiar in hopes of stretching profit margins and shrinking the size of the computer.

"It makes the machine much more portable," Mr. Block said, pointing out that the Air was not meant to "signal the death of the optical drive." The Air does, in Mr. Block's opinion, signal the slow death of another kind of drive critical to computers: the hard disk.