1. [n.d.]. GCC source code. http://ftp.gnu.org/gnu/gcc/. [n.d.]. GCC source code. http://ftp.gnu.org/gnu/gcc/.
2. [n.d.]. Linux Kernel. http://www.kernel.org/. [n.d.]. Linux Kernel. http://www.kernel.org/.
3. [n.d.]. Microsoft Azure Cool Blob Storage. https://azure.microsoft.com/en-us/blog/introducing-azure-cool-storage. [n.d.]. Microsoft Azure Cool Blob Storage. https://azure.microsoft.com/en-us/blog/introducing-azure-cool-storage.
4. [n.d.]. Redis. https://redis.io/. [n.d.]. Redis. https://redis.io/.
5. 2012. Amazon glacier. http://aws.amazon.com/glacier/. 2012. Amazon glacier. http://aws.amazon.com/glacier/.