Peter Oppenheimer, CFO of Apple, outlined the company's core values:
1. We believe in the simple, not the complex.
2. We believe we need to own the primary technologies that we make, and only participate in markets where we can make a significant contribution.
3. We believe in deep collaboration and cross-pollination of our groups. We don't settle for anything less than excellence. We admit when we are wrong and have the courage to change.
On a somewhat related topic, here's a link to the 2005 Stanford commencement address by Steve Jobs