Many of you who publish blogs have home computers, connected to the Internet. If you don't live alone, you probably share the use of your computer, or your Internet access. Even those who live alone may share resources occasionally. It's possible that, if you own your computer and provide your Internet access, you recognise two truths about computer and Internet use: Network resources have a cost . Neither your computer, nor your Internet service, is free. You (or somebody) had to buy your computer, at one time. Somebody pays your ISP a monthly fee, so you can surf the Internet. Network resources are shared . You may have a problem downloading the latest blockbuster movie, while your roommate is listening to his / her favourite Internet radio station. You may notice that it takes 2 - 3 times as long to download a movie in the evening, as it does very late at night. If your household shares a computer (I believe this is still not uncommon), you may have to wait to us...