"Open source" refers to software that is distributed and licensed such that its source code is made available to the public, encouraging many different developers to make changes, fix bugs, and generally improve the software. This is in contrast to typical commercial software for which source code is rarely if ever made available to persons not working for the company that holds the rights to the software in question. In this way, "closed source'' applications have the potential to be held to greater scrutiny and greater consistency of changes (since usually one a small number of individuals will ever see or change the code. However, with "open source" software, the code is usually made available to every who wants it.
The answer is in the question itself. Open-source software has it's source code available to everyone. Closed-source software does not.
The only similarity between Microsoft Windows (propriety) and Ubuntu (open-source) is that they are both operating systems. Apart from that, they are as different as chalk and cheese!
Freeware is computer software that is distributed without charge. Open source is computer software the author of which claims no copyright. There are several ways "open source" is defined, the most popular being GNU. However! Freeware can be copyrighted, and open source can be sold for money.
Teeworlds is an open-source online side-scrolling shoot-em-up. You attempt to reach the objective, which varies between different gametypes. www.teeworlds.com
Open source initiative organization is a not for profit firm that exist to educate and advocate the rights of communities. This organization is a liaison between constituents.
.net is a framework based on Microsoft software and is not open source, php is a language which is open source and based on Linux/unix systems
One rare form of open-angle glaucoma, normal tension glaucoma, is different. People with normal-tension glaucoma have optic nerve damage in the presence of normal IOP.
Unix is not open source, it is proprietary. Linux is the open-source version of Unix.
Open Source Geospatial Foundation's motto is 'Your Open Source Compass'.
It is different for every browser. Generally, you right click on the page and select and option like "view source" or "open source".
Memtest86 is an open source memory software program which checks a computer's RAM memory. It works by testing addresses and data by looking for different patterns.
Open-source means the source code is available to the end-user. The user can modify and change it, following the guidelines in the accompanying license. Close-source means that the source code is held by the developer, and only they can make any changes or study it.