Open Source Applications

Mikko Mustalampi DAP02S

The Open Source Definition

1. Free Redistribution

2. Source Code

3. Derived Works

4. Integrity of The Author's Source Code

5. No Discrimination Against Persons or Groups

6. No Discrimination Against Fields of Endeavor

7. Distribution of License

8. License Must Not Be Specific to a Product

9. License Must Not Restrict Other Software

10. License Must Be Technology-Neutral

www.opensource.org

Table of Contents

-Introduction and definition-Brief history of OS-OS Licenses-Pros and cons-FAQ-Open source CMS demo-Conclusion-Q&A

Brief History of OS

History

Prehistory: Unix, Internet free software, Hacker culture

22. January, 1998: Netscape announces to release source code of the Navigator

3. February, 1998: ”Open Source” term is born in Palo Alto California

February, 1998: www.opensource.org website is opened by OSI Open Source definition

31. March, 1998: Navigator source is released

Open Source Initiative (OSI)

Non-profit corporation dedicated to promote and manage open source definition

Open source certification program

Exists to spread OS to commercial world

Hosts www.opensource.org

Licenses

Open Source Licenses

Open Source Licenses

Licenses are approved by OSI

Permission to state the program to be Open Source

About 50 different licenses at the moment

GPL, LGPL, BSD, MPL, Nokia Open Source License etc.

Example: GPL (GNU General Public License)

”...TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you".Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does.

1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program.You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee.

2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided...”

Pros and Cons

Why to Go Open Source?

Software evolves Improvement, adaptation, bug fixes in astonishing speed

Developer communities Forums, Portals, peer-reviews

Increased security

Reliability

Pros

Customers are not chained to company Program continues to live even company goes bankcrupt

Not dependant of key persons Programs are free! ...and come with source code

Cons

Security Anyone can get the source code

Regulation problems No ones responsible

Job losses

Frequently Asked Questions

How to Make Money?

Services tailoring, support, documents, books

Components unique parts

Merchandise T-shirts, coffee mugs...

What software is there?

Operation Systems Linux, FreeBSD

Internet Apache, BIND, sendmail, Mozilla, OpenSSL, CMSs

Programming tools Perl, PHP, Python, Gnu compilers&tools

www.sourceforge.netwww.opensourcecms.com

Isn’t closed source safer?

False sense of security

Harder to find security holes

Hard to distribute fixes

Open Source CMS demo

Mambo OS CMS

www.mamboserver.com

Conclusion

Future of Open Source programs look bright alltough

Possible European Software Patent is one threat to OS.

Questions? Comments?

Thank You!