Coronavirus disease 2019

COVID-19 is a contagious disease caused by the coronavirus SARS-CoV-2. In January 2020, the disease spread worldwide, resulting in the COVID-19 pandemic. The symptoms of COVID‑19 can vary but often include fever,[7] fatigue, cough, breathing difficulties, loss of...

Android The World Most Popular Mobile Operating System

Android is an open-source mobile operating system developed by Google. Since its official launch in 2008, Android has grown into the most widely used operating system for smartphones, tablets, smart TVs, wearables, and a wide range of connected devices. Its...