Audio Formats
Audio CD: A standard audio CD, playable in any CD player. Holds up to 80 minutes of audio. Audio CDs are great for listening in your car, with your portable CD player, or at your computer. Audio CDs can also be transferred to iTunes for playback on an iPod, just like music CDs.

MP3 CD: MP3 audio files collected on a single CD, playable on an MP3 CD player. MP3 files can also be stored on, and played from, your computers hard-drive. 1 CD can hold approximately 15-18 1 1/2 hour sessions, captured at 64 bit rate. Once on your computer's hard drive, these MP3 files can be transferred to an iPod (or similar device).
Click here for Answers to common questions about MP3 and iPod.

Download: All downloaded files are in the iPod® MP4 iPod Audio format and are specifically designed to work with iTunes® and your iPod®. Its key feature is that it allows you to start listening to a program on your iPod®, stop, listen to another program, and then return to the original program at the exact point you left off. You never lose your spot.
Click here for Answers to common questions about iPod Audio format.

Video Formats
Video DVD: High-quality camera-operated digital video recordings capturing the presenter and all of the reference materials in DVD format.

Media Format	Plays on:					Delivery Time	What makes this format different
	CD Player	Computer	Car	iPod	DVD Player
Audio CD	yes	yes	yes	yes1	-	2 days - 2weeks4	can be played on old and new CD players
MP3 CD	yes2	yes	yes2	yes1	-	2 days - 2weeks4	more hours per CD than an Audio CD
Download	-	yes	-	yes	-	immediate5	immediately available, stored on computer, keeps your place as you listen
Video DVD	-	yes3	-	-	yes	2 days - 2weeks4	visual presentation

1: must be copied into iTunes in order to sync to iPod
2: must be a MP3 compatible player
3: computer must have a DVD drive
4: delivery time depends on shipping method chosen during order process
5: download time depends on connection speed