#3040
The Ultra Wide Band (UWB, ultraband) is a new wireless communication technology with great potential for growth that developed in the 1990s, it was listed as one of the ten communication technologies in the future. Compared with traditional cutoff frequency (corner/break frequency) communication systems, it came up with many obvious characteristics (very wide bandwidth, high speed of data transmission, low power consumption, high safety performance, and so on).

#2281
The update speed of Android version is so fast that almost no Android development tutorial published in paper form can keep up with it. While the biggest winner of The Busy Coder's Guide to Android Development lies in this - it is almost synchronous with Android's version update, so that it also has a corresponding version number.