APIs often come in the form of a library that includes specifications for routines, data structures, object classes, and variables. In other cases, notably SOAP and REST services, an API is simply a specification of remote calls exposed to the API consumers.
The inventor of the photographic process in which a photograph produced without a negative by exposing objects to light on light sensitive paper, is named Man Ray.
The daguerreotype was the earliest commercial photograph available to Americans. Named for Frenchman Louis Daguerre, who perfected this photographic process in 1837, the daguerreotype was produced directly on coated metal without a negative. The daguerreotype was easily made in the mid-1800s.