0-Nuclear Materials, Facilities and Equipment and Miscellaneous
1-Materials, Chemicals, "Microorganisms," and Toxins
2-Materials Processing
3-Electronics
4-Computers
5-Telecommunications and Information Security
6-Lasers and Sensors
7-Navigation and Avionics
8-Marine
9-Aerospace and Propulsion
A-Equipment, Assemblies and Components
B-Test, Inspection and Production Equipment
C-Materials
D-Software
E-Technology
0: National Security reasons (including Dual Use and Wassenaar Arrangement Munitions List) and Items on the NSG Dual Use Annex and Trigger List
1: Missile Technology reasons
2: Nuclear Nonproliferation reasons
3: Chemical & Biological Weapons reasons
5: Items warranting national security or foreign policy controls at the determination of the Department of Commerce.
6: "600 series" controls items because they are items on the Wassenaar Arrangement Munitions List (WAML) or formerly on the U.S. Munitions List (USML).
9: Anti-terrorism, Crime Control, Regional Stability, Short Supply, UN Sanctions, etc.
AT Anti-Terrorism
CB Chemical & Biological Weapons
CC Crime Control
CW Chemical Weapons Convention
EI Encryption Items
FC Firearms Convention
MT Missile Technology
NS National Security
NP Nuclear Nonproliferation
RS Regional Stability
SS Short Supply
UN United Nations Embargo
SI Significant Items
SL Surreptitious Listening
15 C.F.R. §738.2