The Nielsen Norman Group (NN/g) is an American computer user interface and user experience consulting firm, founded in 1998 by Jakob Nielsen and Don Norman.

[1] Their work includes an analysis of the interface of Microsoft's Windows 8 operating system.

[2][3] They have done analyses of the user experience of mobile devices (including the iPad),[4][5][6] and intranets.

[7] As of 2000, Bruce Tognazzini joined Nielsen Norman Group as a partner.

[8] This United States corporation or company article is a stub.