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A proprietary OS is like Apple's MacOS for their computers and the iOS for their iPhones, and iPads or Microsofts Windows OS for examples. They have complete control over who can use it and how they use it. No one else is allowed to make any version of them, etc.
To lock their customers into Apple's proprietary products.
The areas around the building are the proprietary responsibility of the landlord.Source code for operating systems is proprietaryintellectual property, and is kept secret from people who use computers.
Yes. Office is available for use of Apple computers.
Smart people.
Apple computers are made by Apple. Apple write their own operating system called Mac OS X to use on their computers. Legally you can only run Mac OS X on a computer made by Apple. Other makes of computer cannot be turned into Apple computers.
Apple computers and printers technically may have a better and more advanced selection, but companies like Microsoft offer more user friendly computers for everyday people. Apple computers are more for the business or office use.
Mac OS X
If you mean @ for Apple computers press Shift 2
apple
yes you can
Both Dreamworks and Pixar use their own proprietary software to create their films.