Heidegger is the only thinker of his generation whose philosophy of technology is still widely read today. In it, he made three basic claims. First, he asserted that the essence of technology is not technologicalGthat technology is not a neutral instrumentality. Second, he claimed that there is a qualitative difference between modern and traditional technologies. Third and most interestingly, he claimed that technology is a metaphysical perspective, a paradigmatic view of the whole of nature. Although Martin Heidegger remains recognized as a founder of the philosophy of technology, in the past sixty years a whole new world of technologies has appearedGbio-, nano-, info-, and imaging. How adequate is HeideggerGs thinking now for understanding todayGs technological advances? After an extensive Introduction that places Heidegger within the thinking about technology typical of his time, the author reexamines HeideggerGs positions from multiple perspectivesGhistorical, pragmatic, anti-Romantic, and postphenomenological. His critiques invert HeideggerGs essentialism and phenomenologically analyze HeideggerGs favored and disfavored technologies. In conclusion, he undertakes a concrete analysis of the technologies Heidegger used to produce his writing and discovers heretofore undiscussed and ironic results.