Delaware is on I95 between Maryland and New Jersey. One of the toll booths on I95 has a sign that says something about being in Delaware.
I think their only industries are the toll road and a chemical plant across the river from Philly.
A lot of companies used to incorporate there because it was cheap and nobody could find them. Now they incorporate in Nevada and just hide in the desert.
Explosives manufacturers and Credit Card companies. The latter are more destructive. Both like Delaware.