#### 4.2.1 Data Type Definition ¶

Information about type usage is located in the sections specified in Figure~4–1. Figure~4–7 lists some classes that are particularly relevant to the object system. Figure~9–1 lists the defined condition types.

Section | Data Type
--- | ---
Classes | Object System types
Slots | Object System types
Objects | Object System types
Generic Functions and Methods | Object System types
Condition System Concepts | Condition System types
Types and Classes | Miscellaneous types
Syntax | All types—read and print syntax
The Lisp Printer | All types—print syntax
Compilation | All types—compilation issues

Figure 4–1: Cross-References to Data Type Information