The more modern USB Power Delivery 2.0 and 3.0 variations drop fixed profiles in favor of more flexible power rules. These rules keep fixed voltage brackets but allow for a wider range of ...

Before that, we had to deal with a myriad of other peripheral connection types, like Parallel ... power activities between ...

The power output was also increased to 500 mA. This opened up the possibilities of what USB was capable of a whole lot more. USB flash drives hit the market in 2000 to leverage USB 2.0 ...