POS is a portable object system for Scheme. It offers the following
features:

1. It is very portable
   
   Only uses R5RS standard facilities including define-syntax/syntax-rules
   
   
2. Very small
   
   Consists of only 1 constant, 1 function and 1 macro
   
   
3. Supports the following OO features
   1. multiple inheritance
   2. class and instance variables and methods
   3. strong instance and class variable encapsulation
   4. very easy instance variable access from within methods
   5. very simple to use
   6. no MOP but some reflection
      
      
4. Open source and freely available

Download POS FIles

Download from github:

github


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