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１９９９年到２０００年初，中国ＩＴ行业最引人注目的风景就是 ＰＤＡ产品的异军突起。沉寂了 １０年之后， ＰＤＡ产品在短时间令 人惊讶地膨胀到 １００多万台的市场销量，其规模超过前 １０年 销售总和的数倍。 一般来看，一种产品的市场如此高速膨胀只有两种可能，一是在技术上产生了重大突破，二是泡沫作用的推波助澜。具体到ＰＤＡ产品的本身，应该说这两种因素都存在，关键要看哪种因素在起主导作用。 当然，一个市场发展了，对于促进行业进步和技术提高是有益的，但问题是，如此惊人的膨胀就不太正常了，是值得人们警惕的。然而奇怪的是，并没有人认识到它的危险性，反而一片叫好之声。仿佛这样的发展是可以不建立在炒作的基础之上的，是可以不以剥夺消费者利益为代价的。
From 1999 to the beginning of 2000, the most striking landscape in China’s IT industry was the sudden emergence of PDA products. After 10 years of silence, PDA products surprisingly expanded to over 1 million units in a short period of time, surpassing the sales volume of the previous 10 years. In general, there is only two possibilities for such a high-speed expansion of a product market: firstly, a major breakthrough has been made in technology; second, the role of foam has been promoted. Specific to the PDA product itself, it should be said that these two factors exist, the key depends on what kind of factors play a leading role. Of course, if a market develops, it will be beneficial to promote industry progress and technology upgrading. However, the problem is that such an astonishing bloat is not normal and worthy of vigilance. What is strange, however, is that no one realizes its dangers, but on the contrary it is a sound of applause. It seems that such a development can not be based on speculation and can not come at the expense of consumers.