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<h2 id="references">References</h2> <ol> <li id="fn:1"><p>"RFC 678: Standard File Formats". ietf.org. Retrieved June 1, 2019. <a href="https://www.ietf.org/rfc/rfc0678.txt" target="_blank">https://www.ietf.org/rfc/rfc0678.txt</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>"Definition of: punch card". PC Magazine. Retrieved Oct 2, 2019. <a href="https://www.pcmag.com/encyclopedia/term/49962/punch-card" target="_blank">https://www.pcmag.com/encyclopedia/term/49962/punch-card</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> </ol>