The area of Personal Information Management (PIM) primarily deals with how to store, retrieve and share files and other interactional artifacts. According to previous research there is a lack of field studies of actual PIM practices, especially mobile practices. In this article we present findings from an ethnographical study of wireless practice of laptop computers. The study reports on the role of historical interaction resources in a mobile PIM practice as well as the contextual effects on PIM. The findings reveal a PIM-practice highly connected to use situations not always departing from manipulating files and folders, which has been a focus in many previous studies. Designers are encouraged to explore the situated intimate and immediate design space found to be of great importance for the use of these so called Breadcrumbs of Interaction. © 2008 ACM.