A few facts which you may not know :
Patch Tuesday is the second Tuesday of each month, on which Microsoft regularly releases security patches.
Microsoft has an apparent pattern of releasing a larger number of updates in even-numbered months, and fewer in odd-numbered months.
In Nov 1994 , SMS 1.0 was released.
in Aug 2007 SCCM 2007 was released
SCCM can be integrated with other tools of System Center Suite