Author Charles Severance provides an audio recording of his column in which he discusses his interview with John Resig and Pamela Fox regarding the somewhat recent addition of computer science to the topics covered by Khan Academy, where instructors upload short educational lectures on YouTube.

Author Charles Severance provides an audio recording of his Computing Conversations column, in which he discusses his interview with Ian Foster about how the Globus project helps move large amounts of data efficiently and safely, allowing scientists to focus on their research and not on IT problems.

Author Charles Severance provides an audio recording of his Computing Conversations column, in which he discusses his interview with Nii Quaynor about how the story of bringing the Internet to Africa is one of cooperation and collaboration for the common good.

Author Charles Severance provides an audio recording of his Computing Conversations column, in which he discusses his interview with Elizabeth Fong about how the standards were created for the Structured Query Language (SQL) database. From Computer's August 2014 issue: http://www.computer.org/csdl/mags/co/2014/08/index.html. Visit Computer: http://www.computer.org/computer. Subscribe to the Computing Conversations podcast on iTunes at https://itunes.apple.com/us/podcast/computing-conversations/id731495760.

Author Charles Severance provides an audio recording of his Computing Conversations column, in which he discusses his interview with Andrew S. Tanenbaum about the motivation, development, and market impact of the MINIX operating system. From Computer's July 2014 issue: http://www.computer.org/csdl/mags/co/2014/07/index.html.

Author Charles Severance provides an audio recording of his Computing Conversations column, in which he discusses his interview with Nathaniel Borenstein about how email evolved from plaintext to multimedia. Subscribe to the Computing Conversations podcast on iTunes at https://itunes.apple.com/us/podcast/computing-conversations/id731495760.

The second Web extra at http://youtu.be/hgmSyjQwhG4 is an audio recording of author Charles Severance reading his Computing Conversations column, in which he discusses his interview with Doug Van Houweling about how the NSFNet went from connecting a few supercomputers to becoming "the Internet."

Author Charles Severance provides an audio recording of his Computing Conversations column, in which he discusses his interview with Len Kleinrock about the Internet’s humble beginnings.

Author Charles Severance provides an audio recording of his Computing Conversations column, in which he interviews Joseph Hardin about the development of the Mosaic browser at the National Center for Supercomputing Applications and how it introduced the World Wide Web to the general public.

Author Charles Severance provides an audio recording of his Computing Conversations column, in which he discusses his interview with Massimo Banzi about the origins and evolution of the Arduino microcontroller.