Macworld Conference

399358 06: A man touches the Apple iPod mp3 music player on display during the Macworld Conference and Convention January 8, 2002 at the Moscone Center in San Francisco. The conference officially opened today after Apple CEO Steve Jobs delivered a keynote address the day before, at which he announced the arrival of the redesigned iMac. (Photo by Justin Sullivan/Getty Images)

Apple's new G4 Cubes

373463 02: Apple introduced the Power Mac G4 Cube July 19, 2000, an entirely new class of computer that delivers the performance of a Power Mac G4 in an eight inch cube suspended in a stunning crystal-clear enclosure. The G4 Cube is less than one fourth the size of most PCs. The Power Mac G4 Cube uses a revolutionary cooling design that does not require a fan, so it runs in virtual silence. Cooling is provided by the air flowing through the Cube's center vertical cooling channel. In addition, the Cube's entire electronics assembly can be easily lifted out of its enclosure within seconds, providing access to every major component. (Photo courtesy of Apple)

New iBook From Apple

388795 03: Apple introduces the new iBook, May 1, 2001 in Cupertino, CA. The 4.9 pound iBook is the lightest and smallest full-featured consumer and education notebook on the market today. (Photo courtesy of Apple/Newsmakers)

Macworld Expo in Tokyo

402687 01: Visitors test out the new Apple iMac computer and iPod on the opening day of the Macworld Expo March 20, 2002 in Tokyo, Japan. The annual conference will be held until March 23, and is expected to draw 180,000 visitors to the show. (Photo by Koichi Kamoshida/Getty Images)

New iBook From Apple

388795 01: Apple introduces the new iBook, May 1, 2001 in Cupertino, CA. The 4.9 pound iBook is the lightest and smallest full-featured consumer and education notebook on the market today. (Photo courtesy of Apple/Newsmakers)

GBR: London Press Launch Of Apple iPod Mini

LONDON - JULY 16: A Model displays the new Apple iPod product at the Apple iPod mini press launch on July 16, 2004 in London. (Photo by Steve Finn/Getty Images)

Apple's New ortable Music Player

396388 03: Apple Computer Inc. unveiled a new portable music player, the iPod MP3 music player October 23, 2001 at an event in Cupertino, Calif. The device can hold up to 1,000 songs in digital form. (Photo Courtesy of Apple Corp. via Getty Images)

Apple Challenge To Conventional Computer Design

Apple Computer Inc. Intensified Its Challenge To Conventional Computer Design January 5, 1999 By Unveiling The Newly Redesigned G3 Tower With A User Friendly Clamshell Design For Easy Access. The Company Also Lowered The Price On The Imac By $100 To $1,200 And Boosted Its Processing Power And Storage Capacity. Steve Jobs, Apple's Interim Chief Executive, Told The Macworld Computer Show That Apple Expected To Report Its Fifth Consecutive Profitable Quarter Next Wednesday, Furthering Its Recent Recovery From Two Years Of Losses. (Photo By Getty Images)

Apple Unveils Music Store

UNDATED: This photo from Apple Computer shows the company's iPod, a digital music player. Apple launched the iTunes Music Store on April 28, 2003, an online music store that lets customers find, purchase and download music for 99 cents per song. Apple CEO Steve Jobs has described the iTunes Music Store as a way for consumers to legally download music from the Internet while protecting the rights of the artists and music companies. The iTunes Music Store features over 200,000 songs from music companies including BMG, EMI, Sony Music Entertainment, Universal and Warner. (Photo by Apple Computer/Getty Images)

Macworld Conference & Expo 2003 Kicks Off In San Francisco

SAN FRANCISCO - JANUARY 7: People look at new 12-inch and 17-inch power books at Macworld January 7, 2003 in San Francisco. Apple CEO Steve Jobs announced the new powerbooks as well as several new software updates. (Photo by Justin Sullivan/Getty Images)

Foreign media photograph and film the new Apple Co

CUPERTINO, UNITED STATES: Foreign media photograph and film the new Apple Computer iMac Special Edition after Apple interim CEO and co-founder Steve Jobs introduced it during an event in Cupertino, California, 05 October, 1999. AFP PHOTO John G. Mabanglo (Photo credit should read JOHN G. MABANGLO/AFP/Getty Images)

Retailers Struggle To Keep Up With Demand For iPod

CHICAGO - DECEMBER 20: iPod music players sit on display at an Apple retail store December 20, 2004 in Chicago, Illinois. The music players are one of the hottest gifts this holiday season. With many places already sold out of the item they are proving increasingly difficult to find. (Photo by Scott Olson/Getty Images)

MacWorld Conference Opens In San Francisco

SAN FRANCISCO - JANUARY 6: A new iPod mini displayed at Macworld January 6, 2004 in San Francisco. Jobs announced several new products including the new iLife 4 software and the Mini iPod. (Photo by Justin Sullivan/Getty Images)

Apple Releases New iPod

UNDATED: This undated Apple Inc. handout photo shows the new iPod, released on July 19, 2004. The latest model of the portable music player, which has an extended battery life up to 12 hours and a new shuffle feature, is available in 20 and 40 gigabytes models. (Photo by Apple via Getty Images)

Macworld Expo Opens In San Francisco

SAN FRANCISCO - JANUARY 11: The new iPod Shuffle is seen on display at the 2005 Macworld Expo January 11, 2005 in San Francisco, California. Apple CEO Steve Jobs announced several new products during his show opening keynote including the new Mac Mini personal computer starting at $499 and the iPod Shuffle MP3 player starting at $99. (Photo by Justin Sullivan/Getty Images)

Apple Challenge To Conventional Computer Design

375076 01: Apple Computer Inc. Intensified Its Challenge To Conventional Computer Design January 5, 1999 By Unveiling Five Bright New Colors For Its Unusual-Looking Imac Desktop Machine. The Company Also Lowered The Price On The Imac By $100 To $1,200 And Boosted Its Processing Power And Storage Capacity. Steve Jobs, Apple's Interim Chief Executive, Told The Macworld Computer Show That Apple Expected To Report Its Fifth Consecutive Profitable Quarter Next Wednesday, Furthering Its Recent Recovery From Two Years Of Losses. (Photo By Getty Images)

Japanese Macintosh fans try to operate five color

MAKUHARI, JAPAN: Japanese Macintosh fans try to operate five color variations iMac computers at the MacWorld Expo Tokyo at the Makuhari Messe in suburban Tokyo 18 February. Some 20,000 people visited Japan's largest computer exhibition. AFP PHOTO/Yoshikazu TSUNO (ELECTRONIC IMAGE) (Photo credit should read YOSHIKAZU TSUNO/AFP/Getty Images)

Ipod Accessories On View At MacWorld

SAN FRANCISCO - JANUARY 13: Fashionable iPod covers by iDoll are seen on display at the Macworld Conference and Expo January 13, 2006 in San Francisco, California. iPod accessories are popular items to sell at Macworld. For example, Apple Computer, Inc. sold near 14 million of iPods during the 2005 holiday sales quarter, a larger amount than a year ago. Overall Apple leads the market, reportedly, with near 42 million iPods sold, more than three quarters of that amount sold in the year of 2005. (Photo by Justin Sullivan/Getty Images)

iPod Brings Success Back to Apple

BERLIN, GERMANY - APRIL 1: A shopper checks out iPod MP3 players at an Apple dealership April 1, 2005 in Berlin, Germany. The iPod has been a goldmine for computer maker Apple, who's share price has catapulted to new highs in recent months. (Photo by Sea

Apple Launch iPod In South Korea

SEOUL, SOUTH KOREA - SEPTEMBER 22: Models display the latest iPod nano at a press launch on September 22, 2005 in Seoul, South Korea. The latest release from Apple features a 4 GB model with the capacity to store up to 1,000 songs or 25,000 photographs. The iPod nano weighs 1.5 ounces and, measures only 3.5 x 1.6 x 0.27 inches. The 4 GB model will be available on the Korean market at $290 USD and the 2 GB version available for $230 USD. (Photo by Chung Sung-Jun/Getty Images)

The 52nd Annual GRAMMY Awards - Show

LOS ANGELES, CA - JANUARY 31: TV personality Stephen Colbert holding an ipad speaks onstage during the 52nd Annual GRAMMY Awards held at Staples Center on January 31, 2010 in Los Angeles, California. (Photo by Larry Busacca/Getty Images for NARAS)

Apple iPad Release

NEW YORK - APRIL 03: An early customer emerges from the Apple store on Fifth Avenue with Apple Inc's new iPad on April 3, 2010 in New York City. Hundreds lined up in front of the technology company's flagship New York store to be among the first in the world to acquire the device. The much heralded iPad looks to be a bridge between a laptop and smartphone. (Photo by Spencer Platt/Getty Images)

Apple Introduces New iPod

SAN JOSE, CA - OCTOBER 12: A man holds a new iPod with video capabilities October 12, 2005 in San Jose, California. Apple CEO Steve Jobs announced a new iPod that plays video, a new iMac and new version of iTunes that allows people to purchase videos and television shows. (Photo by Justin Sullivan/Getty Images)

Apple IPad Stock

LONDON, ENGLAND - FEBRUARY 17: In this photo illustration, an Apple ipad tablet displays apps on it's home screen on February 17, 2011 in London, England. Apple sold two million ipads in the first two months of their launch in 2010. Worldwide iPad sales are expected to amount to 20 million in 2012. (Photo Illustration by Peter Macdiarmid/Getty Images)

US President Barack Obama carries a comp

US President Barack Obama carries a computer tablet as he walks from the Oval Office to a waiting motorcade on the South Lawn of the White House in Washington, DC, on August 13, 2011, prior to playing golf at Andrews Air Force Base in Maryland. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)

Macworld attendee Kurt Sakaeda looks at

Macworld attendee Kurt Sakaeda looks at the new Apple MacBook Air ultra thin laptop at the MacWorld Conference & Expo in San Francisco 15 January 2008. MacBook Air measures 0.16 inches (0.4cm) at its thinnest point while its maximum height of 0.76 (1.93cm) inches is less than the thinnest point on competing notebooks. AFP PHOTO/Tony AVELAR (Photo credit should read TONY AVELAR/AFP/Getty Images)

Apple CEO Steve Jobs holds a copy of App

Apple CEO Steve Jobs holds a copy of Apple's new operating system Mac OS X during his keynote address at the World Wide Developers Conference in San Jose, California 21 May 2001. AFP PHOTO/John G. MABANGLO (Photo credit should read JOHN G. MABANGLO/AFP/Getty Images)

New Apple CEO Tim Cook Introduces iPhone 4s

CUPERTINO, CA - OCTOBER 04: Apple's Senior Vice President of Worldwide product marketing Phil Schiller speaks about the new clock face for the iPod Nano during introduction of the new iPhone 4s at the company?s headquarters October 4, 2011 in Cupertino, California. The announcement marks the first time new CEO Tim Cook introduced a new product since Apple co-founder Steve Jobs resigned in August. (Photo by Kevork Djansezian/Getty Images)

New Apple CEO Tim Cook Introduces iPhone 4s

CUPERTINO, CA - OCTOBER 04: Apple's Senior Vice President of Worldwide product marketing Phil Schiller speaks about the iPod touch and iPod Nano during introduction of the new iPhone 4s at the company?s headquarters October 4, 2011 in Cupertino, California. The announcement marks the first time new CEO Tim Cook introduced a new product since Apple co-founder Steve Jobs resigned in August. (Photo by Kevork Djansezian/Getty Images)

New York City Prepares For 10th Anniversary Of September 11 Attacks

NEW YORK, NY - SEPTEMBER 07: Lighting Designer Frank Hollenkamp uses his iPad to shoot video of the Tribute in Lights ahead of the tenth anniversary of the September 11 terrorist attacks on September 7, 2011 in New York City. The Tribute in Light is comprised of 88 1-degree beams of 7000 watt searchlights focused into the sky near the site of the World Trade Center in remembrance of the September 11 attacks. (Photo by Andreas Gebhard/Getty Images)