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Ada - Cover 1969

First American edition, McGraw-Hill, 1969

First British paperback edition, with Vivian Darkbloom's notes,

cover design (Cattleya orchid) suggested by the author, Penguin, 1970

Ada in Time and Space 

These are English translations of two chapters in the appendix of the annotated German re-edition of Ada, translated by Uwe Friesel and Dieter E. Zimmer, published by Rowohlt Verlag in September, 2010.

Timeline of Ada 

The Geography of Antiterra

 and Antiterra Gazetteer