TY - Generic T1 - Constructing usable documentation: A study of communicative practices and the early uses of mainframe computing in industry T2 - ACM SIGDOC 1999: Proceedings of the 17th Annual International Conference on Computer Documentation Y1 - 1999 A1 - Zachry, M JA - ACM SIGDOC 1999: Proceedings of the 17th Annual International Conference on Computer Documentation PB - ACM CY - New York SP - 22-25 ER -