Windows Mobile 6 came in three flavors: (for non-touchscreens), Professional (for touchscreens), and Classic (for PDAs). Unlike modern locked-down app stores, Windows Mobile was an open frontier. Users typically downloaded .cab files from websites or synced them from a PC via Microsoft ActiveSync .
: For touchscreen Pocket PCs without cellular radios. 2. Essential Software and Application Categories
For playback of digital music and video, a precursor to the modern Windows App Mobile experience. The Third-Party Ecosystem