Usually the web browser interprets these characters as forming an html tag. To include these as an actual character, substitute these codes. Some characters have an alternate code which is easier to remember. Using <pre> and </pre> does NOT eliminate the need to use these codes.
& = & or & < = < or < > = > or >
You may also need to use these codes, in some situations.
" = " TAB = 	 space =   Line Feed = Carriage Return =