delatnost

1. (of a company) line of business; business activity
   Osnovna delatnost firme je prodaja softvera. — The company's core business is selling software.
   Turizam je važna privredna delatnost u ovom kraju. — Tourism is an important economic activity in this region.
2. activity; work
   Dobio je nagradu za naučnu delatnost. — He received an award for his scientific work.

The word is typical of official and business language, e.g. šifra delatnosti in company documents.