Book excerpt: How digital technologies affect the way we conceive of the self and its relation to the world, considered through the lens of media art practices. In Tactics of Interfacing, Ksenia Fedorova explores how digital technologies affect the way we conceive of the self and its relation to the world. With the advent of ubiquitous computing, the self becomes an object of technological application, increasingly defined by data received from tracking technologies. Subtly, these technologies encourage versions of ourselves that are easier to interpret computationally. Fedorova views these shifts in self-perception through the lens of contemporary media art practices, examining a range of artistic tactics that enable embodied and intimate experiences of machinic operations on our lives.