Equipment is supplied on the basis of information about the needs provided by the ultimate purchaser and user. Although the more information, within limits, the better, suppliers do require a certain minimum amount before they can make recommendations of equipment and price. Some kinds of equipment are sufficiently standardized to allow their specification by standard forms like those of Appendix B. The questionnaires of individual Suppliers sampled in Appendix C are mostly of specialized equipment that requires custom designing to a greater extent. This is a random selection and other suppliers of each type are available to provide service. Following is a listing of questionnaires contained in this Appendix C. The number appearing in italic is the page number on which the form appears.