Long description

The image consists of a square block in the center with two horizontal partitions. A circle with three wavy lines is in the first partition and the second partition is labeled kernel. There is a keyboard on the left connected with the first wavy line in the circle and a cylindrical disk on the right connected with the third wavy line of a circle. Six pages of a book are shown on the top of the square and are connected with the center wavy line of a circle.