An operating system is the primary software that manages all the hardware and other software on a computer.

iOS: This is Apple’s proprietary operating system, based in part on open source BSD, for all of the company’s mobile devices. Because of the “walled garden” approach taken by Apple, iOS is considered to be somewhat more secure than Android, especially for non-techies who like to download and install a lot of apps.

Windows: Practically everyone who’s ever used a computer is familiar with Windows. Although it’s still the dominant operating system on desktops and laptops, it’s fortunes are waning everywhere but as a server system.