machine usable dictionary may know postings made list last couple months derek bickerton developing parser based theory syntax developing last four years purchase machine usable dictionary approximately 70 000 entries 2500 anyone could advise us whether best bet might find dictionaries would appreciate hearing currently working dictionary 1000 words imperative obtain larger one may begin working larger corpora toward end would also like find texts used past parsing competitions results competitions published believe weeks work able modify dictionary sufficiently allow us begin experinmenting texts used past parsing competitions specs parser based series algorithms four years making programming required create parser taken 300 hours using c areapproximately 3000 lines code take 150k executable disk 100k ram required run parser 30k disk required 300 word dictionary average sentence takes 4 seconds process 486 ibm compatible since development version expect numbers change date optimizations occurred expect significantly shrink dictionary disk usage execution time phil bralich bralich uhccux uhcc hawaii edu