English Wikipedia - The Free Encyclopedia. In computer science, a thread of execution is the smallest sequence of programmed instructions that can be managed independently by a scheduler, which is typically a part of the operating system.
Deserts cover more than one fifth of the Earth's land, and they are found on every continent. A place that receives less than 10 inches (25 centimeters) of rain per year is considered a desert. Deserts are part of a wider classification of regions called drylands..
Deserts can form for many reasons. The Mojave and Great Basin deserts in North America are dry because they are in the rain shadow of the California coastal mountain range. Moist air is blown from the oceans up the side of the mountains where it rains and snows.By the time the air has crossed the mountains there is very little moisture left.esert types. Deserts are dry places where little rain or snow falls. Some deserts get less than 25 mm (1 inch) of precipitation each year. Other deserts may get up to 250 mm (10 inches) of precipitation. Cold deserts form at higher latitudes.