Hi I have noticed that some of the ApacheCon slides are in .odp format:
http://people.apache.org/~schultz/ApacheCon%20NA%202017/Seamless%20Upgrades%20for%20Credential%20Security%20in%20Apache%20Tomcat.odp http://people.apache.org/~schultz/ApacheCon%20NA%202017/Let's%20Encrypt%20Apache%20Tomcat.odp The .odp format does not work for me because it is for OpenOffice (I don't have OpenOffice installed on my Mac OS), and neither Pages and Microsoft PowerPoint could open it. I am wondering that should it be convert it to a more universal format like pdf, so that more people can open it without any confusion. Thanks, Huxing