12. An apparatus according to claim 11 wherein said storage means comprises three 3-dimensional conditional probability stores, each of which is associated with a respective one of said first, second, and third output lines, and each of which has stored therein all of the conditional probabilities assigned to a given output line that the character inferred on that line resulted from the character recognition machine having scanned a character of another alpha-numeric character form; said storage means further including three 2-dimensional working stores, the input of each connected to the output of a respective one of said 3-dimensional stores, each of the aforesaid 2-dimensional stores for storing a 2-dimensional array of conditional probabilities selectively transferred thereto from its respective 3-dimensional store consequent upon the identity of the alpha-numeric character on an aforesaid output line assigned to a given 3-dimensional working store; said storage means additionally comprising three 1-dimensional working stores, the input of each of which is connected to the output of a respective one of said second-dimensional stores, each of said 1-dimensional stores for storing a 1-dimensional array of conditional probabilities selectively transferred from its respective 2-dimensional store; circuit means for connecting said first output line to its respective 3-dimensional store, for connecting said second output line to the 2-dimensional store associated with its respective 3-dimensional store connected to said first output line, and for connecting said third output line connected to the 1-dimensional store associated with the 3-dimensional store connected to said first output line; and means for selecting a 2-dimensional array of conditional probabilities for transfer from said 3-dimensional store to its respective 2-dimensional store, consequent upon the identity of the character inferred by the character recognition machine on said first output line, for selectively transferring from the aforesaid 2-dimensional store to its respective 1-dimensional store, a selective 1-dimensional array of conditional probabilities consequent upon the identity of the character inferred by the character recognition machine on said second output line, and for selectively outputting from the aforesaid 1-dimensional store a single conditional probability consequent upon the identity of the character inferred by said character recognition machine on said third output line.
12. An apparatus according to claim 11 wherein said storage means comprises three 3-dimensional conditional probability stores, each of which is associated with a respective one of said first, second, and third output lines, and each of which has stored therein all of the conditional probabilities assigned to a given output line that the character inferred on that line resulted from the character recognition machine having scanned a character of another alpha-numeric character form; said storage means further including three 2-dimensional working stores, the input of each connected to the output of a respective one of said 3-dimensional stores, each of the aforesaid 2-dimensional stores for storing a 2-dimensional array of conditional probabilities selectively transferred thereto from its respective 3-dimensional store consequent upon the identity of the alpha-numeric character on an aforesaid output line assigned to a given 3-dimensional working store; said storage means additionally comprising three 1-dimensional working stores, the input of each of which is connected to the output of a respective one of said second-dimensional stores, each of said 1-dimensional stores for storing a 1-dimensional array of conditional probabilities selectively transferred from its respective 2-dimensional store; circuit means for connecting said first output line to its respective 3-dimensional store, for connecting said second output line to the 2-dimensional store associated with its respective 3-dimensional store connected to said first output line, and for connecting said third output line connected to the 1-dimensional store associated with the 3-dimensional store connected to said first output line; and means for selecting a 2-dimensional array of conditional probabilities for transfer from said 3-dimensional store to its respective 2-dimensional store, consequent upon the identity of the character inferred by the character recognition machine on said first output line, for selectively transferring from the aforesaid 2-dimensional store to its respective 1-dimensional store, a selective 1-dimensional array of conditional probabilities consequent upon the identity of the character inferred by the character recognition machine on said second output line, and for selectively outputting from the aforesaid 1-dimensional store a single conditional probability consequent upon the identity of the character inferred by said character recognition machine on said third output line. 13. An apparatus according to claim 12 wherein each of three aforesaid 3-dimensional stores are connected to respective ones of said first, second and third outout lines; wherein each of three aforesaid 2-dimensional stores are connected to said second, third and first output lines so that each associated pair of 3-dimensional and 2-dimensional stores is connected to different ones of said output lines; and wherein each of three aforesaid 1-dimensional stores is connected to said third, first and second output lines so that each of three 3-dimensional, 2-dimensional and 1-dimensional branches of stores is connected to a respective one of said three output lines, to thereby yield at the outputs of each of said 1-dimensional stores the aforesaid first, second and third type conditional probabilities.