a group of parts that work together for a common purpose

a group of independent but interrelated elements comprising a unified whole

(physical chemistry) a sample of matter in which substances in different phases are in equilibrium

an organized structure for arranging or classifying

a group of physiologically or anatomically related organs or parts

a procedure or process for obtaining an objective

a complex network of organs, tissues, and cells working together to support and sustain life

an ordered manner; orderliness by virtue of being methodical and well organized

computer programs and pieces of hardware operating together