HP aquired Novadigm.
Altiris acquired Previo, Computing Edge, Wise, FSLogic, Bridgewater Tonic and Pedestal.
Symantec have aquired Ghost, Powerquest and On Technologies.
Novell aquired Ximian and Tally Systems.
LANDesk was aquired by Avocent.
Microsoft aquired Softricity and Desktop Standard.
Now Symantec have spent again and announced the intent to acquire Altiris.