The IP Code consists of the letters IP followed by two digits and an optional letter. More at Wikipedia
IP address - An Internet Protocol address is a numerical label that is assigned to devices participating in a computer network that uses the Internet Protocol for communication between its nodes.
EN 50102 – IK code on resistance to mechanical impacts
MIL-STD-810 - The military standard referred to as MIL-STD-810, "Department of Defense Test Method Standard for Environmental Engineering Considerations and Laboratory Tests" emphasizes tailoring an equipment...
National Electrical Manufacturers Association - The National Electrical Manufacturers Association or NEMA is a U.S.-based association, which was created on September 1, 1926, when the Associated Manufacturers of Electrical Supplies ...