High Quality Content by WIKIPEDIA articles! The User-Subjective Approach is the first interaction design approach dedicated specifically to Personal Information Management (PIM). The approach offers design principles with which PIM systems (e.g. operating systems, email applications and Web browsers) can make systematic use of subjective (i.e. user-dependent) attributes. The approach evolved in three stages: (a) Theoretical Foundations first published in a Journal of the American Society for Information Science and Technology during 2003 . The paper introduce the approach and its design principles (b) Evidence and Implementation was published in another JASIST paper in 2008 . The paper gives empirical evidence in support of the approach as well as seven novel design schemes that derives from it (see also the user-subjective website). It has won the Best JASIST paper award in 2009 .(c) Specific Design Evaluation this stage has already begun with evaluation of the first user-subjective design prototype called GrayArea in a Conference on Human Factors in Computing Systems paper published in 2009.