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tintypes (photographs)
Photographs produced by the wet collodion process directly on lacquered metal, usually iron.
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data (information)
information, especially digital information. In common usage in computer science, used as a singular noun to refer to information that exists in a form that may be used by a computer, excluding the program code. In the sciences and other contexts, "datum" is the singular and "data" is the plural, referring to facts or numbers in a general sense. For general reference to facts, use "information."
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Kodachrome (TM)
a subtractive color reversal process using a film with an integral tripack of black-and-white emulsions, each layer sensitized to a separate primary color. The film contains no dyes; the color developing agents and color couplers are supplied in development, each layer being dyed and bleached separately by carefully controlled processing through three machines, with separate drying between each machine. For Capstaff's two-color Kodachrome process, use "two-color processes"
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transparencies
images designed for viewing by transmitted light. Most often refers to transparent positive photographs; can also refer to transparent nonphotographic images that are designed for projection viewing or as intermediates for reproduction
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