The SYSUSERLIST view is provided for compatibility with older versions of Sybase IQ.
Each row of the SYSUSERLIST view describes a user, without exposing their user_id and password. Each user is identified by their user name.
The SYSUSERLIST view is a SQL Anywhere compatibility view. See SQL Anywhere 11.0.1 > SQL Anywhere Server - SQL Reference > System Objects > Views > Compatibility views > SYSUSERLIST compatibility view (deprecated).