• multiple track
• shift over turing machine
• non deterministic
• two way turing machine
• multitape turing machine
• offline turing machine
• multidimensional turing machine
• composite turing machine
• universal turing machine

A Turing machine is a machine that can perform any possible computation, and emulate any real world computer, except other Turing machines.

A Universal Turing machine however, is a theoretical machine that could even emulate Turing Machines.

In actuallity they're both the same, since if you fed the tape from a Turing machine into another Turing machine, the second would in essence be emulating the first.

Its also useful to note that Turing machines aren't really "machines" per se, but actually models of the process of computation itself.

the turing machine

One Turing machine, with fixed set of transitions, which can simulate any Turing machine, including itself, and thus can compute anything computable

offline turing machine is like standard turing machine which imlemented by adding a control unit(temp storage)and seperate input tape..