n. a model whereby forms are executed, returning zero or more values.
Such execution might be implemented directly in one step by an interpreter
or in two steps by first compiling the form and then
executing the compiledcode; this choice is
dependent both on context and the nature of the implementation,
but in any case is not in general detectable by any program. The evaluation
model is designed in such a way that a conforming implementation
might legitimately have only a compiler and no interpreter, or vice versa.
See Section 3.1.2 The Evaluation Model.
n. 1. an object, often used to emphasize the use
of the object to encode or represent information in a specialized
format, such as program text.
The second expression in a let form is a list
2. the textual notation used to notate an object in a source file.
The expression 'sample is equivalent to (quote sample).