Hardware:
• A PC with a 1GHz Intel or AMD processor
• Intel Pentium D or faster processor is required to play Standard Definition video from the iTunes Store
• 2.0GHz Intel Core 2 Duo or faster processor is required to play HD video, an iTunes LP, or iTunes Extras from the iTunes Store
• 512MB of RAM; 1GB is required to play HD video, an iTunes LP, or iTunes Extras
• Screen resolution of 1024×768 or greater; 1280×800 or greater is required to play an iTunes LP or iTunes Extras
• DirectX 9.0-compatible video card with 32MB of video RAM; 64MB recommended
• QuickTime-compatible audio card
• Broadband Internet connection to use the iTunes Store
• iTunes-compatible CD or DVD recorder to create audio CDs, MP3 CDs, or back-up CDs or DVDs

Software:
• Windows XP Service Pack 2 or later, or 32-bit editions of Windows Vista
• 64-bit editions of Windows Vista require the iTunes 9 64-bit installer; for more information, visit www.itunes.com/download
• QuickTime 7.6.4 (included)
• 200MB of available disk space
• Screen reader support requires Window-Eyes 7.0 or later; for information about accessibility in iTunes, visit www.apple.com/accessibility

iPod and iPhone:
• Syncing purchased videos requires iPod nano (3rd generation), iPod classic, iPod (5th generation) with software version 1.2 or later, iPod touch, or iPhone
• Transferring rented movies requires iPod nano (3rd generation) and iPod classic with software version 1.1 or later or iPod touch and iPhone with iPhone software version 1.1.3 or later
• Syncing ringtones requires iPhone software version 1.1 or later
• Purchasing or syncing applications require an iPhone or iPod touch with the iPhone 2.0 Software Update or later
• Purchasing from the iTunes Music Store for iPhone or iPod touch requires iPhone software version 1.1.1 or later
• Syncing iPod Games requires iPod nano (3rd generation), iPod classic, or iPod (5th generation) with software version 1.2 or later. Some iPod Games may not be compatible with iPod nano (3rd generation) and iPod classic

Nike + iPod:
• Nike + iPod requires a Nike + iPod Sport Kit or Sensor, a compatible iPod, and Nike+ ready shoes or compatible gym equipment
• Nike + iPod is compatible with iPod nano and iPod touch (2nd generation). iPod nano (1st generation) must have software version 1.2 or later
• To see your complete workout history on nikeplus.com, an Internet connection and a free nikeplus.com account are required

Apple TV:
• Renting or purchasing using Apple TV requires Apple TV software version 2.0 or later
• HD movie rentals from the iTunes Store are designed exclusively for Apple TV and may not be transferred to iTunes

AirPort Express with AirTunes:
• Playing your music with one or more AirPort Express base stations requires AirPort Express software version 6.3 or later
• AirPort Express with AirTunes requires an AirPort or AirPort Extreme card and a compatible stereo system or powered speakers