Electronic commerce - Congresses.

Challenges of Expanding Internet: E-Commerce, E-Business, and E-Government = 5th IFIP Conference e-Commerce, e-Business, and e-Government (I3E' 2005), October 28-30, 2005, Poznan, Poland / by: (Language materials, printed)

Electronic Commerce/e-business.

Electronic commerce

Computer Science.

Data Encryption.

Public administration

Computer Communication Networks.

Business enterprises

Internet in public administration

Information Systems Applications (incl.Internet)

Database Management.