* cdr-safe: List Elements.
* ceiling: Numeric Conversions.
* centering point: Vertical Scrolling.
+* cerror: Signaling Errors.
* change hooks: Change Hooks.
* change-major-mode-hook: Major Mode Conventions.
* changing key bindings: Changing Key Bindings.
* charset-registry: Charset Property Functions.
* charset-reverse-direction-charset: Basic Charset Functions.
* charsetp: Charsets.
+* check-argument-type: Signaling Errors.
* check-toolbar-button-syntax: Toolbar Descriptor Format.
* check-valid-char-table-value: Working With Char Tables.
* check-valid-inst-list: Specifier Validation Functions.
* CL note---default optional arg: Argument List.
* CL note---integers vrs eq: Comparison of Numbers.
* CL note---lack union, set: Sets And Lists.
-* CL note---no continuable errors: Signaling Errors.
* CL note---only throw in Emacs: Catch and Throw.
* CL note---rplaca vrs setcar: Modifying Lists.
* CL note---set local: Setting Variables.
* debug-on-next-call: Internals of Debugger.
* debug-on-quit: Infinite Loops.
* debug-on-signal: Error Debugging.
+* debug-on-signal use: Handling Errors.
* debugger <1>: Internals of Debugger.
* debugger: Debugger.
* debugger command list: Debugger Commands.
* define-abbrev: Defining Abbrevs.
* define-abbrev-table: Abbrev Tables.
* define-derived-mode: Derived Modes.
+* define-error: Error Symbols.
* define-function: Defining Functions.
* define-key: Changing Key Bindings.
* define-logical-name: Changing File Attributes.
* display-buffer: Choosing Window.
* display-buffer-function: Choosing Window.
* display-completion-list: Completion Commands.
+* display-error: Processing of Errors.
* display-message: The Echo Area.
* display-warning: Warnings.
* display-warning-minimum-level: Warnings.
* error name: Error Symbols.
* error symbol: Error Symbols.
* error-conditions: Error Symbols.
+* error-message-string: Processing of Errors.
* errors: Errors.
* esc-map: Prefix Keys.
* ESC-prefix: Prefix Keys.
* PATH environment variable: Subprocess Creation.
* path-separator: System Environment.
* pausing: Waiting.
-* peculiar error: Error Symbols.
* peeking at input: Peeking and Discarding.
* percent symbol in modeline: Modeline Data.
* perform-replace: Search and Replace.
* shrink-window-pixels: Resizing Windows.
* side effect: Intro Eval.
* signal: Signaling Errors.
+* signal-error: Signaling Errors.
* signal-process: Signals to Processes.
* signaling errors: Signaling Errors.
* signals: Signals to Processes.