Also, 'smurfing,' an approach whereby a hacker overloads a server, was seen to be on the rise. Now don't be getting scared. Other reports show that the internet is getting more reliable and that most e-mail is getting to its destination quickly. However, what we cannot escape is the fact that we are entering a Digital World where things will never be quite as stable as in the physical world. The essence of something digital is that it is fluid and malleable.
Digital things have very little physical existence.
A computer programme might be a central nervous system for an airport but it in itself has very little substance compared to all the concrete and planes. Physical things have a wide variety of forms and substance. We can go from water, which is very fluid, to a diamond, which is very hard. However, physical things exist around us. They house us.