(but the user may log in the system by other means).
</para>
<para>
- The comment field is used by various system utilities, such as
+ The comment field, also known as the gecos field, is used by
+ various system utilities, such as
<citerefentry><refentrytitle>finger</refentrytitle>
- <manvolnum>1</manvolnum></citerefentry>.
+ <manvolnum>1</manvolnum></citerefentry>. The use of an ampersand
+ here will be replaced by the capitalised login name when the field
+ is used or displayed by such system utilities.
</para>
<para>