====== Delta, i.e changes from earlier versions of Eiffel ======

There have been many changes since OOSC2 published in 1997, and even the later text Touch of Class.

[[https://www.eiffel.org/doc/eiffelstudio/Differences_between_ETL_2nd_printing_and__Eiffel_Software__implementation|Differences between ETL 2nd printing and Eiffel Software implementation]]

and

[[https://www.eiffel.org/doc/eiffelstudio/Differences_between_standard_ECMA-367_and_Eiffel_Software_implementation|Differences between standard ECMA-367 and Eiffel Software implementation]]