The Sand Dollar Legend. Described in The Legend of the Sand Dollar below, it's design by God ,the Creator, tells the good news of the Gospel of Jesus Christ! This makes a wonderful Christian object lesson for kids of any age! One of my favorite activities as a child was finding sea shells at the beach. Although, I didn't live near a beach, my oldest sister did.
Linux is referred to as open-source precisely because it is. Open-source is the ability for anyone to view the code necessary to make the program. The Linux kernel, and most of the programs that are available for it, have their source code available, under a variety of licenses. Linux is referred to as open-source precisely because it is.
To be considered as open source software by the software development industry, certain criteria must be met: The program must be freely distributed (It can be part of a package that is sold though, such as Red Hat has done with Linux in the example below).