SharedSection 1024,3072,512,512

in
HKLM\SYSTEM\CurrentControlSet\Control\SessionManager\SubSys
tems\Windows

The section:
SharedSection

used to be (WIN2000)
SharedSection 1024,3072,512
where first entry = heap for interactive
second entry = heap systemwide
third entry = heap for non-interactive

Any idea of the 'fourth entry' in WIN2K SP3?

SharedSection 1024,3072,512,512
^^^

This used to be detailed in Q142676, but I can't find it
anymore even with just 142676 ...

TIA
RUC