Programmer 
Content
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 whether or not the source code is accessible to the public. Definition Open source Open source code can be used by anyone without a license and is distributed with the source code. Advantages Can be modified and improved by anyone Technical support from online community Can be modified and sold on Disadvantages Support available online may be insufficient or incorrect. No user manuals. Lower security as may not be developed in a controlled environment Closed Source Closed source code requires the user to hold an appropriate license to use it. Users cannot access the source code as the company owns the copyright license. Thorough, regular and well-tested updates Company owning software provides expert support and user manuals. High levels of security as developed professionally. License restricts how many people can use the software at once Users cannot modify and improve software themselves