What does sbwait mean in top ?

[Jon Drews]

Hi:

 What does sbwait mean in top? Is it related to a sysctl setting? I
have looked in the man page for top, at William LeFebvres site (
http://www.groupsys.com/top ), in Evi Nemeth's "UNIX System
Administration Handbook" and Googled in general.  Does anyone know of
a URL that gives an explanation of sbwait and for that matter semwait
too.

                                              Kind regards,
                                              Jon