Rumored to be called iMusic, Steve Jobs introduced iTunes in his keynote at MacWorld San Fransisco 2001. Steve actually called it iMusic once in his speech. It is an Apple-branded version of Casady & Greene's SoundJam MP with some improvements and an interface overhaul.

Some of the similarities between iTunes and SoundJam:
1) Choosing "Get Info..." for a music file yields the *identical* dialogue in both programs, from the three-tabbed layout (Info, Tags, and Options) right down to every single item, button, and label.

2) The control strip module bundled and auto-installed with each program is also identical except for a different icon and "iTunes" inserted in place of "SoundJam MP" in the pop-up menu.

3) The repeat and shuffle buttons at the bottom of the playlist window in iTunes bear the same icons as their SoundJam siblings. Their behavior is identical also - for example, option-clicking the shuffle button in both applications reshuffles the playlist. Keyboard commands for playing, pausing, moving between tracks, etc are identical.

Weirdest of all:

4) SoundJam has its own unique alert sound, a bubble-sounding ding. When SoundJam is the frontmost application, that alert sound preempts the system alert sound. For example, if you hit the power key while running SoundJam, the Shut Down dialogue appears accompanied by the SoundJam bubble-ding. I hit the power key in iTunes: up popped the Shut Down dialogue, accompanied by the *SoundJam* bubble-ding.

Source: Macintouch (www.macintouch.com) and Duncan Brook