Abstract: A method and apparatus for organizing and processing pieces of interrelated information (or “thoughts”) using a digital computer is disclosed. The invention employs a graphical user interface to facilitate user interaction with highly flexible, associative “matrices” that enable users conveniently to organize digitally-stored thoughts and their network of interrelationships. Each of the thoughts may be affiliated with one or more application programs, such as a word processing or spreadsheet utility, or an Internet browser. Users are able conveniently to select a current thought along with any applications or content associated with that thought by interacting with the graphical representation. That representation is automatically reoriented about the selected thought, and is revised to reflect only those thoughts having predetermined relations to that current thought. Users can easily modify the matrix by interactively redefining relations between thoughts.