From The Free On-line Dictionary of Computing (19 January 2023):
SMALL
1. Functional, lazy, untyped.
["SMALL - A Small Interactive Functional System",
L. Augustsson, TR 28, U Goteborg and Chalmers U, 1986].
2. A toy language used to illustrate denotational
semantics.
["The Denotational Description of Programming Languages",
M.J.C. Gordon, Springer 1979].