A computer that is strapped to the body and accessed via voice recognition and a head mounted display (HMD). The computer is ruggedized for the natural abuse it receives in the work environment. The head mounted display gives the illusion of a floating monitor in front of the user's face. In the 1980s, vendors compressed a full computer into a backpack, which by the mid-1990s became much smaller. Of course, today's smartphones are tiny by comparison but have far more computing power. See head mounted display and Google Glass.