Corpus Linguistics is an offshoot of Linguistics which emerged in 1970s and gained momentum in the present century. Computer shave dramatically changed every aspect of our life and same is the case with linguistics. Like other fields of life interfaces between linguistics and computer science are also growing and are likely to be of high interesttolinguistsandthisinterestisacceleratingmoreandmoreinfuture. Nowadays computer corpora are used for a number of purposes such as dictionary writing, lexical analysis, translation of different languages, study of semantic changes, neologisms, and learning other languages. This paper is an attempt to introduce corpus linguistics, its scope and types to the readers so as to make them familiar with this branch of linguistics and to motivate them to collect computer corpora for Pashto language.