One NSWindow handling multiple NSDocument instances

Cocoa’s document architecture envisions that a window should only handle one document. However library-type applications may need one window to handle multiple documents so that the user can easily switch between libraries without restarting the application. Here’s how you can hack AppKit so that a single window handle multiple documents.
HP Spectre One

The Proliferation of Apple Clones: A Conspiracy Theorist’s Perspective

HP, Samsung, and others are cloning Apple’s successful product designs. Is it because they’re simply not creative or is it the result of internal politics and the lack of long-term focus of their respective leaders? Only those in the respective companies boardroom’s inner circle have knowledge of what’s actually happening. But a conspiracy theorist can argue that it’s the result of the legal head’s sweet talks who wants more funding to his department at the expense of the engineering and product design departments.