If you hear or read about internet security, it's because you don't even have to see it for something to have been put on your computer. Because of the way this works, it is just as easy to view a web page you are creating right from your own hard drive long before you ever put it on a server where the whole world can see. A browser is just like a word processor, in the sense that it is opening a document and doing something with it. When a browser downloads files to display a web page, it puts them in a temporary folder, usually called a cache , where those files continue to exist even after the page is no longer being viewed. The cache can be emptied manually, or most browsers have preferences you can set to empty it at certain times or intervals.
Many browsers also create a history of addresses and files that the browser has worked with.
If you are a very private person, or doing naughty things from the office, then this is something that might come back to haunt you. The history, like the cache, can usually be wiped. When you view an HTML file directly from somewhere on your hard drive, a copy of the file is downloaded to the cache, along with any associated files. We Get A Web Page. Basically, a web page is just like a book page except that just about anyone can publish one, and it's a million billion times easier to share it with people all over the world.