Mixins were introduced with Flavors by Howard Cannon in 1979. Flavors/Mixins were used to implement some of the early MIT Lisp Machine user interface, IO and ne

Mixins were introduced with Flavors by Howard Cannon in 1979. Flavors/Mixins were used to implement some of the early MIT Lisp Machine user interface, IO and networking code. http://lispm.de/docs/Publications/Flavors/Flavors,%20a%20non-hierarchical%20approach%20to%20object-oriented%20programming.pdf http://lispm.de/docs/Publications/Flavors/Flavors,%20a%20non... 'aspect advice' was mostly introduced in Lisp in 1966 by Warren Teitelman: http://dspace.mit.edu/handle/1721.1/6905 http://dspace.mit.edu/handle/1721.1/6905 See the discussion of ADVISE and a BEFORE example in the paper... From there it came to Interlisp, Maclisp, Flavors and CLOS...