I would like to know what is considered to be the first electronic digital computer.
A literature ambiguous on this. I found these claims:
- ENIAC - a computer constructed by Mr. Eckert and Mr. Mauchly at the University of Pennsylvania
- Colossus - a computer used in Bletchley Park to break the Enigma code, connected with Alan Turing (correction provided in comments: in fact Colossus was used for breaking Lorentz SZ40 enciphered teleprinter)
- Harvard Mark I - a computer constructed in collaboration between Howard Aiken and IBM
- Z1, Z2 and Z3 - a computers constructed by German scientist Konrad Zuse
Personally, I would say that ENIAC is the right answer, because Colossus was single purpose electromechanical machine, Harvard Mark I was rather an electromechanical calculator than a computer, and Zuse's computers were highly experimental devices (Z1 and Z2 were electromechanical, Z3 was never completely constructed).
ENIAC was completely electronicised programmable universal computer. But on the other hand it used decimal coding of numbers instead of binary one. If we take this into account, the first computer should be EDVAC or BINAC.
Could anybody please shed more light on this? Some resources would be appreciated as well.