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In regards to your question, I would suggest adding industries that are general in nature and then adding speaking topics that are very specific to your expertise and specialties. For topics, you should provide more details on your expertise by deﬁning key topics you speak about (these can be single words or phrases).
Note: with a starter account you are able to add up to 3 industries and topics, and a premium account allows up to 10 industries and topics to be specified.
I'd suggest taking a quick read through our getting started guide for speakers for more information on how to maximize the visibility of your profile through industries and speaking topics: http://www.speakerfile.com/wp-content/uploads/2011/10/GetStartedSpeakerFINAL.pdf