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.
The answer is that yes, some species of snake are excellent climbers, and can climb walls. But not just any wall. The snake must have something to grab ahold of and push off of. Not even a rough surface will do-snakes can't stick to walls the way insects, rats, and lizards often do.