1. A computer implemented method of producing personalized documents comprising: inputting handwritten alphanumeric characters; using the computer to map the inputted characters into at least one set of text characters, wherein the mapping is done by converting the inputted alphanumeric characters into mathematical functions approximating a shape of each inputted alphanumeric character; entering a textural document into the computer; transcribing the textural document into a set of text characters corresponding to the inputted alphanumeric characters; and printing the transcribed textural document.