It can be argued that Z3 was not as general purpose (Turing complete) as ENIAC. "The Z3 was demonstrated in 1998 to be, in principle, Turing-complete. However,

It can be argued that Z3 was not as general purpose (Turing complete) as ENIAC. "The Z3 was demonstrated in 1998 to be, in principle, Turing-complete. However, because it lacked conditional branching, the Z3 only meets this definition by speculatively computing all possible outcomes of a calculation."