lispdoc - results for *features*

*features*
Variable: a list of symbols that describe features provided by the implementation
 Mentioned in:
CLtL2 - 22.1.4. Standard Dispatching Macro Character Syntax
CLtL2 - 25.4.2. Other Environment Inquiries
PCL - features and read time conditionalization
PCL - listing a directory
Successful Lisp - basic eval