### Alphabetical list of part-of-speech tags used in the Penn Treebank Project:

Number | Tag | Description
1. | CC | Coordinating conjunction
2. | CD | Cardinal number
3. | DT | Determiner
4. | EX | Existential there
5. | FW | Foreign word
6. | IN | Preposition or subordinating conjunction
7. | JJ | Adjective
8. | JJR | Adjective, comparative
9. | JJS | Adjective, superlative
10. | LS | List item marker
11. | MD | Modal
12. | NN | Noun, singular or mass
13. | NNS | Noun, plural
14. | NNP | Proper noun, singular
15. | NNPS | Proper noun, plural
16. | PDT | Predeterminer
17. | POS | Possessive ending
18. | PRP | Personal pronoun
19. | PRP$ | Possessive pronoun
20. | RB | Adverb
21. | RBR | Adverb, comparative
22. | RBS | Adverb, superlative
23. | RP | Particle
24. | SYM | Symbol
25. | TO | to
26. | UH | Interjection
27. | VB | Verb, base form
28. | VBD | Verb, past tense
29. | VBG | Verb, gerund or present participle
30. | VBN | Verb, past participle
31. | VBP | Verb, non-3rd person singular present
32. | VBZ | Verb, 3rd person singular present
33. | WDT | Wh-determiner
34. | WP | Wh-pronoun
35. | WP$ | Possessive wh-pronoun
36. | WRB | Wh-adverb