Harvard's free programming classes teach you how to think, debug, and adapt in an AI-driven world where knowing code matters more than ever.

Abstract: I welcome you to the fourth issue of the IEEE Communications Surveys and Tutorials in 2021. This issue includes 23 papers covering different aspects of communication networks. In particular, ...

Free days at the U.S. National Parks have been changed to no longer include Martin Luther King Jr. Day and Juneteenth, just weeks after the Trump administration announced it would be raising fees for ...

In 2026, Americans will get free admission to national parks on President Donald Trump's birthday but no longer on Juneteenth and Martin Luther King Jr. Day, according to the National Park Service ...

Can you chip in? As an independent nonprofit, the Internet Archive is fighting for universal access to quality information. We build and maintain all our own systems, but we don’t charge for access, ...

Abstract: According to research, the vast majority of road accidents (90%) are the result of human error, with only a small percentage (2%) being caused by malfunctions in the vehicle. Smart vehicles ...