The Collaborative International Dictionary of English v.0.48:

Tinman \Tin"man\, n.; pl. Tinmen.
   A manufacturer of tin vessels; a dealer in tinware.
   [1913 Webster]

The Free On-line Dictionary of Computing (30 December 2018):

Tinman

    The third of the series of DoD requirements that
   led to Ada.  Written by HOLWG, DoD, Jan 1976.

   See Strawman, Woodenman, Ironman, Steelman.

   (1976-01-01)