The present study documents everyday adult writing by type of text and medium (computer or paper) in an "in vivo" diary study. The authors compare writing patterns by gender, race/ethnicity, educational attainment, age and working status. The study results reveal that (a) writing time varied with demographic variables for networkers, but these variations disappear for workers; (b) all demographic groups spent more time writing documents than prose; (c) most demographic groups spent an equal amount of time writing using computers and paper, but younger and higher educated groups spent more writing time on the computer, while older and less educated groups spent more time writing using paper than the computer; and (d) workers spent more time writing using computers than paper. Implications of the study findings are discussed, and suggestions for future research are also given. (Contains 1 note and 5 tables.)