The following typeface conventions are used:
| /path/name | A path name (directory). |
| filename.txt | A file name (with or without a path). |
| program | A program, sometimes with a path name. |
|---|---|
| host.domain.com | A host or machine name, sometimes with a domain attached. |
| variable | A variable or varying parameter. |
| PATH | An environment variable. |
| DPDIR=/opt/dp | A fragment of script or configuration file. |
| ls -l | A shell command. |
| POP3 | A protocol. |
In many places a sentence naturally ends with a command or file name. A full-stop after a file name is likely to confuse things, so I have adopted the habit of leaving off the final full-stop. The start of a new sentence can be deduced by the initial capital letter.