[stack] Classifying languages by how they handle operands

It occurred to me recently that one way to differentiate programming
languages is by how they handle operands.

Operands in many languages appear in two places. They are placed
directly in expressions to be evaluated,  such as a + b + c, and are
passed to functions or procedures, such as add(a,b,c).

Lisp and its cousins use operands only once, placing them in a
structure preceded by an operator, (+ a b c) , effectively combining
their passing and evaluation. 

The languages of interest to this group place operands in a structure
followed by a sequence of operators, (a b c) + +, which also combines
passing and evaluation. 

While admittedly low level, is this concept worthy of further
discussion? Has it been discussed before, either here or elsewhere?
--
Don