Difference between Apple's ios and Mac OS

Apple's ipad is a tablet computer.
　　iPad is a series of tablet computers released by Apple in 2010. It is positioned between Apple's smart phone iPhone and laptop products. Send and receive emails, watch e-books, play audio or video, play games, and more. Designed by a team led by British-born design executive Jonathan Ive (some translated as Jonathan Ive), this sleek, ultra-thin product reflects Ive's reverence for the genius German designer Dieter Rams Feelings.
　　Due to the ARM architecture, it is not compatible with ordinary PC desktop and notebook programs. It can be used for office work by installing the iWork suite officially provided by Apple, and Office and PDF files can be previewed and edited through iOS third-party software.

　　The IOS system is suitable for Apple mobile phones and ipads, but not for computers. Mac OS X is the operating system of Apple computers.
　　OS X is an exclusive operating system developed by Apple for the Mac series. OS X is the pre-installed system for Apple's Mac line of products, and it reflects the purpose of simplicity everywhere.
　　OS X is the world's first comprehensive operating system based on the FreeBSD system using an "object-oriented operating system". The "object-oriented operating system" was developed by NeXT, a company founded by Steve Jobs after he was forced to leave Apple in 1985. Apple later bought NeXT. Steve Jobs returned to the role of CEO of Apple, and the Mac OS system that Mac started using was integrated into the Openstep system developed by NeXT.