TY - GEN ID - cogprints1580 UR - http://cogprints.org/1580/ A1 - Harnad, Stevan Y1 - 1991/// N2 - The 4th revolution after speech, writing and print, is skywriting (email, hypermail, web-based archiving). KW - knowledge KW - skywriting KW - scholarly publication KW - electronic journals KW - language evolution KW - online archiving KW - hypermail TI - Post-Gutenberg Galaxy: The Fourth Revolution in the Means of Production of Knowledge SP - 39 AV - public EP - 53 ER -