There are two or three questions there.
The first thing I'd like to say is that investing in R and D is absolutely critical to the success of the high-tech industry, so it shouldn't surprise people when I mention that last year we invested $700 million in R and D. That's the first thing that's important.
Secondly, a famous researcher observed that for every year that you invest in a critical technology--that becomes critical over time--the amount of investment you need to catch up to all those cumulative investments from another company, if you start today, becomes an order of magnitude greater. In other words, if you started ten years ago, your investment may seem small, but today if someone tried to get in and invest and compete with you, the investment would be massive. That's why those investments are important.