The document is a calendar from January to December 2017 that highlights important dates and devices in the history of computing. Each month notes early computing devices from different decades, including the Atari Paddles from 1977, the Palm Tungsten E from 2003, the Olivetti Quaderno from 1992, and the Competition Pro from 1986. The calendar serves to illustrate the evolution of computers and digital information management over time with pictures and facts from key dates and devices.