Wolfram's list of language design mistakes in SMP is interesting, particularly how he dropped SMP's symbolic indexing from Mathematica, but still kept echos of

Wolfram's list of language design mistakes in SMP is interesting, particularly how he dropped SMP's symbolic indexing from Mathematica, but still kept echos of the idea in function definitions: http://reference.wolfram.com/mathematica/tutorial/MakingDefinitionsForFunctions.html http://reference.wolfram.com/mathematica/tutorial/MakingDefi... Also interesting is the little decryption challenge (turns out he stored his copy of SMP in an encrypted form and can't find the key).