Materiel Item categories from MIL-STD-881F are:
* Aircraft Systems
* Electronic/Generic Systems
* Missile/Ordnance Systems
* Strategic Missile Systems
* Sea Systems
* Space Systems
* Ground Vehicle Systems
* Unmanned Maritime Systems
* Launch Vehicle Systems
* Information Systems/Defense Business Systems

The common elements identified in MIL-STD-881F, Appendix K are: Integration, assembly, test, and checkout; Systems engineering; Program management; System test and evaluation;