Video: Arithmetic Logic Unit (ALU): Definition, Design & Function. An arithmetic logic unit (ALU) represents the fundamental building block of the central processing unit of a computer. An ALU is a digital circuit used to perform arithmetic and logic operations.
Snake Crawls up a Wall. 02.10.2008 - Many people ask me about the climbing capability of snakes. In particular, people want to know if snakes can get up into their attic. The answer is that yes, some species of snake are excellent climbers, and can climb walls.
In addition to rodent burrows, snakes will use a variety of places to hide. Thomas Northcut/Lifesize/Getty Images. While it is true that snakes often hide in holes, they do not construct their holes themselves -- these are primarily the former holes of rodents, turtles and frogs. Additionally, snakes hide inside tree hollows, or under the leaf litter, rocks or bark.