Si ha accedit directament a aquest document si us plau llegiu-vos primer el document de presentació i motivació.
Enquesta preparada per en llpuges per al PFC PLEP'04
.
Copyright (c) llpuges 2004
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License , Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.