Every user on a UNIX machine has a home directory. This is always the initial working
directory when you first log in.
A home directory is owned by you (we will look at permissions later); a private work area.
Home also has some special startup files that tell UNIX and the shell how to deal with you.
For example your ".forward" file tells the UNIX mailer where to forward your
mail. [.files are usually special in some way -- they are usually similar to stored user preferences]