LTE-U: on the way to 5G

Ericsson and Qualcomm are promoting their new technology, LTE-U. Is it any better that LTE-A? And what is this combinations of letters supposed to mean, after all?
Reading-can-be-harmful

Are you getting enough sleep at night? If not, it might be because your sleep pattern is disrupted due to the display on your PC, TV, tablet, and smartphone.