"Delete: The Virtue of Forgetting in the Digital Age" is a new book was written by Professor Viktor Mayer-Schönberger’s (Princeton U Press 2009). In this book, at the first chapter the author gives us two examples .A teacher who just got the qualification but failing to get a job because of the picture of her on a social networking site.And  another psychotherapist refused entry to the USA because of a journal article which was published several years before, in which he mentions having taken LSD in the 1960s. Through the examples ,the author arises a interesting problem,do we need to remember all that ?Do we need to keep everything for a long time ? The author consider it is a problem that we must solve that. At the end ,the author presents his own solution to the problem- data with a shelf life. He mentions "expiration date",namely that all the information whatever in your hard drive ,e-mail, website ... Should be delete in a prescriptive time.

About this problem,we discuss on our class . Eighteen students agree with the author's point and twelve students disagree with that . In my opinion, i agree with the author's view but not absolutely.

We know in the past people have to write down if we want to record information or rely on our human memory. Compare with the digital technology, it is limited. It is also very difficult to recall someone's memory before 20 or 30 years ago.  If some information is very important and it is still valuable ,how can we deal with them? Delete them? Or like the author's view ,give all the information a "expiration date". I want to say some information we must keep . In account of they are valuable even if not at the moment. That is why i cannot agree with the author's opinion.

Depends on the different kinds of the information, the solution should be different. Some information should keep one years ,two years even longer. But it isn't necessary to keep forever. So as the author's example ,the past is not present. Everything can be changed .

So I think we should create a new technique skill to control the information on the Internet in order to we can employ everything effective.