The elisp docs in the session "12.1 What Is a Function?" distinction the funtion and the function-like object.
But in some pages, some function-like object is give as a function. 
For example:
In session "3.4 Comparison of Numbers", "=" is a set to a "function" but, in fact it a "special forms".

In the same resason, I think, "<", "<=", ">", ">=" also should be "special forms".