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What is Twitter? it is "Instantly connect people everywhere to what is most meaning full to them ". He has been leading Twitter's open source more than 3 years. It's include the creation of open source programs, managing inbound and outbound licensing of open source software, and pushing for the evolution of Twitter’s open source strategy. He showed the Twitter runs on open source such as Linux, jQuery, MySQL, redis and others. However, He think when you open source code, there's a chance that someone on the inside or outside will let you know it's been done in some way already. Also he mention about Define Secret Sauce for open source and others as below:  '''Define Secret Sauce''' * Don't Open source anything that represents a core business value. Define your secret sauce so there's a shared understanding that can guide company decisions. Embed this secret sauce within your culture and company  '''Embrace open source'''

* small changes add up Nelson show us Bootstrap in Tiki. Tiki is "the Free and Open Source Web Application with minimized riskthe most built-in features. So whatever feature you can imagine running in your browser window, chances are Tiki does it". Tiki Wiki CMS Groupware is a web content management system that has thousands of built-in features and is likely the most comprehensive integrated system that exists today.

*'''Time saver''''''common language between designers and developers between the Photoshop person and the CSS person more standard approach when developing new feature'''

I know more Each speaker was presentation their own experience about open source after they are shared their own opinions . They main point of the open source is free to run it, to study and experience change it. Most speaker have same opinion about open source in different way as enhance complete project efficiency, build it by people around world and also have many other advantage. As I Chris Aniszczyk said "The right thing to usdo. It is These days, it's very helpful in difficult to build anything without benefiting from open sourcecode in some fashion. Find ways to pay it forward as a 'rising tide lifts all boats' in the industry". I agree what they said. Open source is open source? It's developed through free awesome. They sharing idea with others, many developer work on a project together around world, reduce duplication and the transparent exchange of ideasimprove it.

I know more about open source after they are shared their own opinions and experience about open source to us. It is very helpful in open source. what is open source? It's developed through free sharing and the transparent exchange of ideas. However, There are many advantage of open source. First, the quality of the project. The project is created by many developers and enhance the project quality. Secondly, it is freedom. Users can control to make their own decisions for software. And also they can do whatever they want in software. Finally, The cost of the open source software. It is very good choice for business because you can get better quality at a fraction of the price or maybe free.

In the end, I am pretty grateful to them for sharing their experience in open source. I get better understanding about it than before. I think I will enjoy in open source and it will improve me. Also, connect with other people from different country. Let's Open Source.