Start with the Internet itself for freely available software technologies, then add some custom software.
CITATION STYLE
Nicol, J. R., Gutfreund, Y. S., Paschetto, J., Rush, K. S., & Martin, C. (1999). How the internet helps build: Collaborative multimedia applications. Communications of the ACM, 42(1), 79–85. https://doi.org/10.1145/291469.291474
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