Phonology, Morphology
Chunking/Shallow Parsing
Parsing/Grammatical Formalisms
Semantic Processing
Lexical Semantics
Ontology
Linguistic Resources
Statistical and Knowledge based methods
POS tagging
Discourse
Paraphrasing/Entailment/Generation
Machine Translation
Information Retrieval
Text Mining
Information Extraction
Question Answering
Dialog Systems
Spoken Language Processing
Speech Recognition and Synthesis