Big ? Hmm. The Z1 could be described as a desktop computer, since Zuse (and his friends) bulid it on his parents kitchen table - but it tool up the whole table. Thru wartime tjhere have been 4 Models - Z1..Z4. After the war I think somewhat like 40 or so designes, and some of them had quite some success. The Zuse company did some very unique computers some of them even part analogue and part digital. They also did the first computer generated graphics not only in science lab, but also sold drawing/cartography equippment. They also had the first plotter running. And sold them. Also some early CNC installations are credited to Zuse (Beside that he in fact designed the first process controlling computer ever - for production of V1 cruise missiles) Eventualy SIEMENS bought Zuse in the 60s. Some exist sill - i.e. a reproduction of the Z1 in the Museum fur Verkehr und Technik in Berlin, or a Z3 in the Deutsches Museum in Munich. I don't know if any of the later (after Z11) 'usual' machines survived. Gruss H. PS.: Zuse also aquired some patents in the 50s for his ideas about the Feldrechenmaschiene (field calculating engine) - early ideas for parallel processing and still base for a lot of newer designs. P.P.S.: Try http://www.histech.rwth-aachen.de/www/quellen/Histcomp/Zuse.html for a nice lifetime/development story. -- Ich denke, also bin ich, also gut HRK