2.1 What is RLISP
 2.2 Modes, function classes
 2.3 Evaluation model, symbols, and variables
 2.4 Variable types
 2.5 Symbols, numbers and strings
 2.6 Boolean values
  2.6.1 Pairs, lists
 2.7 Programming with lists
 2.8 In-place operations
 2.9 Equal tests: Equality vs. Identity
 2.10 Properties, Flags
 2.11 Alists
 2.12 Vectors