Alan Turing's "Turing machines" provide for a universal notion of computation. Wolfram|Alpha simulates, analyzes and gives information about the rule space of many Turing machines. It also creates interactive visualizations, including network visualizations, of the evolution of Turing machines. Specify a rule number or explicit rule or just give a number of states and colors for a random sample.
Investigate this simple model of a computer with simulations, analysis and visualizations.
Dive deep into the time evolution of a Turing machine, view only every nth slice of time or view only the steps where the head reaches the far left, right or center of the tape.
Specify the initial conditions of a Turing machine, both its state and tape. Set the width of the tape and seed it with random, constant and/or repeating initial values.