29-11-2012, 06:36 PM
open source and free software
1open source.ppt (Size: 168.5 KB / Downloads: 29)
what is open source software?
Open Source software is distributed with its source code. The Open Source Definition has three essential features:
It allows free re-distribution of the software without royalties or licensing fees to the author
It requires that source code be distributed with the software or otherwise made available for no more than the cost of distribution
It allows anyone to modify the software or derive other software from it, and to redistribute the modified software under the same terms.
Steven Weber, The Political Economy of Open Source Software, BRIE Working Paper 140,
examples of open source software
Internet
Apache, which runs over 50% of the world's web servers.
BIND, the software that provides the DNS (domain name service) for the entire Internet.
sendmail, the most important and widely used email transport software on the Internet.
Mozilla, the open source redesign of the Netscape Browser
OpenSSL is the standard for secure communication (strong encryption) over the Internet.categories.
Operating Systems
Linux
FreeBSD, OpenBSD, and NetBSD: The BSDs are all based on the Berkeley Systems Distribution of Unix, developed at the University of California, Berkeley. Another BSD based open source project is Darwin, which is the base of Apple's Mac OS X.