“Although many people frequently belittle Palm OS 4 as being nothing new, it has introduced true disk-like expansion to the Palm platform en masse. Although not the first instance of expansion options for Palm OS, OS 4-based devices are now appearing in droves, ushering in a new wave of applications and possibilities. Of course, as with any major step forward, with all of these new options come new problems, incompatibilities, and confusion.” Part I, Part II and Part III of the article at InfoSync.