Build a computer that supports our operating system

We are looking for a company to build us a computer that will run on our operating system, that would be similar to PC or apple but the concept the computer would run on our operating system and be different from PC and Apple in terms of software, it would not be universal, but it would require new software that would be designed for the computer. For example it would not run with windows or apple startup. But have its own operating system. Many thanks, Looking forward to a offer to design and build a working computer, that only will support our operating system. The main point is it cannot be a copy of Pc or windows operating system or apples but must be unique in its own and have its own software to run the computer.. Looking forward to your bids.