<span>Apple's os x and microsoft windows are examples of <span>operating system software. The operating system software </span></span><span>is a</span> software<span> that manages the </span>computer hardware<span> and </span>software<span> resources and provides common </span>services<span> for </span>computer programs. It <span>is the most important </span>software that runs on a computer. Windows<span>, is a family of graphical </span>operating systems<span> developed, marketed, and sold by Microsoft and apple (MAC) OS is the operating system developed by apple. </span>
