Outlook 2003 did create the idea of search folders and the whole Longhorn philosophy. You can see it at work in search folders, where instead of having to drop things into individual folders, and things exist only in one folder, you create these search folders and you have the criteria for the search folder.

I believe OS/2 is destined to be the most important operating system, and possibly program, of all time. As the successor to DOS, which has over 10,000,000 systems in use, it creates incredible opportunities for everyone involved with PCs.

If we have optimism without empathy then it doesn't matter how much we master the secrets of science. We're not really solving problems, we're just working on puzzles.

The computer was born to solve problems that did not exist before.

With Windows 8, Microsoft is trying to gain market share in what has been dominated by the iPad-type device. But a lot of those users are frustrated. They can't type. They can't create documents.

Vaccines are extremely well tested; their safety is well understood. The false allegations about vaccines causing autism have been disproven. But there are still echoes out there confusing people.

People who say they don't see the acceleration of innovation is a wilful blindness. We are innovation at a wonderful speed for the basic things we think everyone should get.