The appendix of an article can include various types of products depending on the subject matter and purpose of the article. However, without specific information about the topic, it is difficult to provide a comprehensive list of product types that could be included in the appendix. Nevertheless, here are some common product types that may be relevant in different contexts:

2. Statistical data: If the article involves quantitative analysis, the appendix may include tables, charts, or graphs presenting the raw data or statistical results that support the findings.

3. Technical specifications: In articles related to technology, engineering, or manufacturing, the appendix may include technical specifications of products or equipment mentioned in the main text. This could include diagrams, blueprints, or schematics.

4. Experimental procedures: For articles in scientific or experimental fields, the appendix may include detailed descriptions of experimental procedures, protocols, or methodologies used in the study.

5. Supplementary materials: In some cases, the appendix may include supplementary materials that provide additional information or evidence to support the main text. This could include photographs, maps, diagrams, or other visual aids.

6. Case studies: If the article focuses on specific case studies or examples, the appendix may include detailed descriptions, data, or documentation related to those cases.

7. Legal documents: In articles related to law, policy, or regulations, the appendix may include legal documents, contracts, agreements, or relevant legislation that supports the arguments or findings presented in the main text.

8. Survey results: If the article includes survey data, the appendix may include the full survey questionnaire, response rates, or detailed survey results.

9. Literature reviews: In articles that involve extensive literature reviews, the appendix may include a comprehensive list of references or sources consulted during the research process.

It is important to note that the inclusion of specific product types in the appendix will depend on the nature of the article and the requirements of the publication or academic journal. Therefore, it is advisable to consult the guidelines or instructions provided by the publisher or editor to ensure that the appendix meets the necessary criteria.