35. An apparatus for highlighting and categorizing images from a document using a sequence of word tokens representing words of the document, the word tokens comprising character shape code classes, each word of the document being represented by only one word token, the apparatus comprising: means for eliminating predetermined character shape code classes from said sequence of word tokens; means for removing predetermined common function word tokens and numerical word tokens from said sequence of word tokens to form a reduced sequence of word tokens using a pattern matching technique and a stop token list comprising an optional token list; means for determining word token frequency appearance rates for the word tokens of the reduced sequence; means for ranking said frequency of appearance rates; means for determining the nth or more most frequently appearing word tokens based on the ranked frequency of appearance rates; and means for highlighting words of the document corresponding to the nth or more most frequently appearing word tokens.
35. An apparatus for highlighting and categorizing images from a document using a sequence of word tokens representing words of the document, the word tokens comprising character shape code classes, each word of the document being represented by only one word token, the apparatus comprising: means for eliminating predetermined character shape code classes from said sequence of word tokens; means for removing predetermined common function word tokens and numerical word tokens from said sequence of word tokens to form a reduced sequence of word tokens using a pattern matching technique and a stop token list comprising an optional token list; means for determining word token frequency appearance rates for the word tokens of the reduced sequence; means for ranking said frequency of appearance rates; means for determining the nth or more most frequently appearing word tokens based on the ranked frequency of appearance rates; and means for highlighting words of the document corresponding to the nth or more most frequently appearing word tokens. 36. The apparatus according to claim 35, further comprising means for categorizing the document into one of a plurality of pre-existing categories.