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.
After all, many of the snakes found in toilets are simply not native to the areas where they were found. It's much more likely that they escaped or were liberated by owners who no longer wanted them then that a nest of nonnative snakes is setting up home in a sewer pipe [source: Vettel ].ortunately, there's no guarantee that this snake traveled through the pipes at all. He may have gotten in some other way and simply curled up in the toilet to relax. Not exactly a soothing thought, but better than imagining a snake entering through the pipes every time nature calls.