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[text] Open source vs closed source Source code is written by a programmer and refers to object code before it has been compiled. When software is described to be open source or closed source this refers to hether or not the source code is accessible to the public. Open source Closed Source by anyone Definition Open source code can be used Closed source code requires the by anyone without a license and user to hold an appropriate is distributed with the source license to use it. Users cannot code. access the source code as the company owns the copyright license. Advantages Can be modified and improved Thorough regular and welltested updates Technical support from online community Company owning software provides expert support and user manuals. Can be modified and sold on High levels of security as developed professionally. Disadvantages Support available online may be insufficient or incorrect. No user manuals. License restricts how many people can use the software at once Lower security as may not be developed in a controlled environment Users cannot modify and improve software themselves