- Date of birth: October 05, 1957
- Born: in Copenhagen, Denmark.
- Description: Jakob Nielsen is a leading web usability consultant. He holds a Ph.D. in human-computer interaction from the Technical University of Denmark in Copenhagen. He is also the principal of the Nielsen Norman Group which he co-founded with Dr. Donald A. Norman (former VP of research at Apple Computer). Before starting NNG in 1998 he was a Sun Microsystems Distinguished Engineer. Nielsen founded the "discount usability engineering" movement for fast and cheap improvements of user interfaces and has invented several usability methods, including heuristic evaluation. He holds 79 United States patents, mainly on ways of making the Web easier to use.Nielsen has also given his five quality components of Usability Goals, which are: Learnability, Efficiency, Memorability, Errors (as in low error rate), Satisfaction.