"he bought a new stereo system"
"the system consists of a motor and a small computer"

"a vast system of production and distribution and consumption keep the country going"

"in a static system oil cannot be replaced by water on a surface"
"a system generating hydrogen peroxide"

"they have to operate under a system they oppose"
"that language has a complex system for indicating gender"

"he changed the arrangement of the topics"
"the facts were familiar but it was in the organization of them that he was original"
"he tried to understand their system of classification"

"the body has a system of organs for digestion"

"they had to devise a system that did not depend on cooperation"

"exercise helped him get the alcohol out of his system"

"his compulsive organization was not an endearing quality"
"we can't do it unless we establish some system around here"