Clearly, they should all be academics and all people you have worked with.
Appendices As referenced already in some of the preceding categories, it is ok to include an appendix.
Technical and practical skills, certifications, languages, and more, are relevant to mention in this section.
Professional affiliations and memberships If you belong to any professional group or network related to your areas of expertise, you should mention them in this section.
You may also include your visa status, as relevant.
Career Summary The career summary is not a statement of your ambitions or objectives.
Research As an academic, your research experiences, your findings, the methods you use and your general research interests, are critical to present in the first part of your CV.
Professional experience If you have been employed in industry and it is relatively recent (approximately within the last 5-10 years) and relevant to your academic work, it is important to include it.
Include the names of the institutions, thesis or dissertation topics and type of degree obtained.
The listing of publications is a key part of an academic's CV.
The advice and tips are organized into categories as could be used to structure a CV as well.
You do not need to follow the format used here, but it is advised to address the categories covered here somewhere in your CV.