Collection of computers that don't have software X installed

Code :
select SMS_R_System.ResourceID,SMS_R_System.ResourceType,SMS_R_System.Name,SMS_R_System.SMSUniqueIdentifier,SMS_R_System.ResourceDomainORWorkgroup,SMS_R_System.Client
from SMS_R_System
inner join SMS_G_System_COMPUTER_SYSTEM on SMS_G_System_COMPUTER_SYSTEM.ResourceID = SMS_R_System.ResourceId
where SMS_G_System_COMPUTER_SYSTEM.Name not in
(select distinct SMS_G_System_COMPUTER_SYSTEM.Name
from SMS_R_System
inner join SMS_G_System_COMPUTER_SYSTEM on SMS_G_System_COMPUTER_SYSTEM.ResourceID = SMS_R_System.ResourceId
inner join SMS_G_System_ADD_REMOVE_PROGRAMS on SMS_G_System_ADD_REMOVE_PROGRAMS.ResourceID = SMS_R_System.ResourceId
where SMS_G_System_ADD_REMOVE_PROGRAMS.DisplayName like "%Adobe Reader 8%")

Documentation
Sometimes you want to create a collection that will find all the computers that don't have a particular software installed and push it to it. This is a good dynamic way to create a collection instead of direct computer addition.

Assuming you have Adobe Reader setup to install to all computers you can key this off of the Workstation collection or limit it to a OU collection. You notice that I use the "LIKE" condition instead of the "equals." I do this because you never know what version you might have. Look at Reader 7.09, even though you update your package with the latest reader you would need to change the collection.
This way it will always look for the computers with no reader. This is assuming of course, that you push the updates to reader and not uninstall and reinstall the whole application each time.
As the hardware inventory updates the computers will be removed from the collection at refresh time.

Example:  Created one for Spark software :
select SMS_R_System.ResourceID,SMS_R_System.ResourceType,SMS_R_System.Name,SMS_R_System.SMSUniqueIdentifier,SMS_R_System.ResourceDomainORWorkgroup,SMS_R_System.Client
from SMS_R_System
inner join SMS_G_System_COMPUTER_SYSTEM on SMS_G_System_COMPUTER_SYSTEM.ResourceID = SMS_R_System.ResourceId
where SMS_G_System_COMPUTER_SYSTEM.Name not in
(select distinct SMS_G_System_COMPUTER_SYSTEM.Name
from SMS_R_System
inner join SMS_G_System_COMPUTER_SYSTEM on SMS_G_System_COMPUTER_SYSTEM.ResourceID = SMS_R_System.ResourceId
inner join SMS_G_System_ADD_REMOVE_PROGRAMS on SMS_G_System_ADD_REMOVE_PROGRAMS.ResourceID = SMS_R_System.ResourceId
where SMS_G_System_ADD_REMOVE_PROGRAMS.DisplayName like "%spark%")