The mnemonic "FACE" spells out the four notes in the spaces (from bottom to top) between the staff lines in a treble clef, while the staff lines themselves spell out "EGBDF" from bottom to top. Most music students remember this as "Every Good Boy Does Fine."
In music notation, a treble clef on the staff looks something like this:
/\
----| /-----
|/
----/-------
/|
--/-|/\-----
| | |
-|--|--|----
\ | |
---\|_/-----
|
\|