What is the name of the desert that covers parts of South Africa, Namibia, and Botswana?

In which continent is the Patagonia Desert located? What is the name of the desert that covers parts of Algeria, Chad, Egypt, Libya, Mali, Mauritania, Morocco, Niger, and… What is the name of the desert that covers about 270,000 square kilometers in Western Australia? In which country is the Atacama Desert located? In which continent is the Arabian Desert located? Which desert spans across several countries in North Africa? Which desert is home to the highest population density? What is the name of the desert that covers parts of Kazakhstan and Uzbekistan?