Physical tags Physical tags are more likely to remain constant from one browser to another.
All physical tags have code which begin and end the tag.
All logical tags have code which begin and end the tag. The command on a Unix computer to lists files in a directory area is dir , followed by an Enter key. When you are learning HTML, it is a good idea to make a backup copy of your files. If you use this tag, you then have to type text and spaces and press the Enter key, similar to working with a courier font in your word processor. Although none of the above tags are required, we think you can see that some of these will be useful to you at times.