And just as 30 years ago we couldn't conceive that we would have the power of a mainframe computer that took up a room this size in our purses and on our belts, that we're carrying around in our cell phone today, and suddenly, computing, that used to be an expert driven system, it was a personal system that we all owned as part of our daily lives -- that shift from mainframe to personal computing
就在30年前， 我们还不能够想象到我们能够有一台 具有主体计算机的能力，却只有 我们的钱包和皮带大小， 我们今天可以随时随地用手机带着它。 突然间，计算机化， 原先只是个专家驱动系统， 是一个个人系统，我们把它作为我们日常生活的一部分。 那个从主体到个人化的转变