Due to its widespread acceptance, USB is becoming the de facto industry standard for connecting peripherals to PC's and laptops.
Many of the new peripherals now using USB are also portable.
As these portable devices increase in popularity, there is a growing need for them to communicate directly with each other when a PC is not available.
The On-The-Go Supplement addresses this need for mobile interconnectivity by allowing a USB peripheral
preview:
http://www.usb.org/developers/onthego
5/1/2003