Today is a major milestone for Microsoft as our first Developers Conference here in China.

The key partnerships we build with software developers around the world are central not only to the success of Windows but also to realize the great possibilities that PC technology provides. It's through applications of every variety that businesses will be using the personal computer as the tool of the Information Age.

Microsoft has a vision for where the PC is going. And that vision says that PCs will become a central element of how companies share information inside the company. The name of that vision is, the so called Digital Nervous System (DNS) , allowing companies to reduce paper work and make better decisions. The Digital Nervous System means that not only do you have the PCs that are connected together, and not only do you have standard elements like electronic mail but also you've really thought carefully about what information is important, and so all of the processes-order taking, sales planning, personnel management, project management—all of those have been set up to take full advantage of the capabilities of the computer.

Now, another major vision that Microsoft has is that writing the programs, writing the applications for these machines needs to get very easy and we need to be able to do it, so we can write programs that run across the entire Internet which is millions of machines. So this is a new approach to programming that draws on what was done previously. DNS says that developers should be able to focus on their particular task and not have to learn a lot about management of the machine resources.

Great chips and systems developed by our partners who are here with us sponsoring this event, make this all possible. And there's an incredible opportunity for developers. The applications that are written today will sell to an even larger base of machines out in the market. There is a lot that we're doing to increase the work of developers—make sure they understand where the PC is going and how tools can help them and we're even helping them now, with more and more marketing type of activities making sure they get in with the customers.

And this is something that we are just going to increase year after year, after year. And so the overall DNS message is one about helping developers seize that opportunity by bringing together the different architectures, making things automatic and allowing this to be done in a great evolutionary fashion.

The so called DNS means all the following EXCEPT______.

A．efficient working mode

B．sound decisions to be made

C．smooth ways to be connected to other PCS

D．removal of all the downsides of PCS