Internal and external disloyal competition
Anti sabotage
Counterespionage
Professional infidelity and absenteeism
   Environmental investigations against ecological damage
Protection of patents and registered
trade marks

Counterfeit of products
Debugging and wire-tapping
 
LEAK OF FORMULAE, PRODUCTIVE PROCESSES AND STRATEGIC PLANS

Also in this case the so called "immaterial goods" of a company need to be protected. In short, their whole know-how is often under direct attacks that are aimed at finding an unsuspecting fount of information.