... Language front ends for databases and expert systems constitute further applications and are intended to make systems more acceptable to the user. The majority of present applications deal with written language. The definition of a good NLP system rides ultimately on the criteria by which it is judged. In the case of this essay, the criteria are computational; for example, the system must be efficient in terms of speed and memory, modular and easy to maintain. As with every computer system it can also be judged by the extent to which it carries out the task for which it is designed. It is also useful to bear in mind other factors such as the psychological plausability of the system, that is, to what extent the system models the way humans understand and generate language. Humans do afterall represent the best NLP system to date and if we just solve the ...

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