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.
Snake (Elaphe alleghaniensis or Pantherophis alleghaniensis) Black Rat Snakes are excellent climbers and are often seen high up in trees, sometimes stretched across a. branch sunning themselves as in the picture below. I often find Black Rat Snakes sunning on logs or rocks or even on black top roads.