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© Paolo Melchiorre Open-L 2007 Free Software and Copyleft Paolo Melchiorre June 9, 2007 Gabriele d’Annunzio University – Pescara (Italy)

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© Paolo Melchiorre Free Software ● Free Software definition – Essential four freedoms – Source code ● Copyleft mechanism – Freedom guarantee – Copyleft inheritance

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© Paolo Melchiorre The Free Software history ● GNU project – Richard Stallman – GPL license ● Linux kernel – Linus Torvalds – The complete system

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© Paolo Melchiorre The Free Software history ● GNU/Linux distributions – Debian – Red Hat – Ubuntu ● Software companies and Free Software – IBM – Sun Microsystem – Netscape

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© Paolo Melchiorre Software legal protection ● Copyright ● Software protection ● User licenses ● Copyleft © 🄯

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© Paolo Melchiorre Software types Free Software Copylefted software 🄯 Free-download software Proprietary Software Freeware Shareware Public domain software

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© Paolo Melchiorre Free Software contributors ● Community – Users – Developers – Managers ● External actors – Institutions – Companies – Non-profit organizations

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© Paolo Melchiorre The software cost ● Total Cost of Ownership (TCO) – systems adaptation – operating costs – training – services – development costs ● Free Software – low initial costs – best and cheapest services

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© Paolo Melchiorre Business Types ● Software distributions – simplicity, assistance ● Hardware support – drivers, compilers, software ● Services – assistance, maintenance, safety ● Documentation – books, magazines, manuals, publications

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© Paolo Melchiorre Creative works ● Free Documentation ● Creative Commons – The 5 licenses ● Free Music – Jamendo and open formats ● Video – Blender and Elephant Dream

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© Paolo Melchiorre Conclusions ● Potential – distribution – development method – economic model ● Protection – copyleft ● Risks – little knowledge