The computer is nonspecific. English uses two kinds of articles: definite (the) and indefinite (a, an). A/an serve the same grammatical purpose. A is used before consonant sounds (a pie, a green apple ...

The indefinite article is used similarly to English, but is omitted with job titles, such as elle est prof - she is a teacher. Higher Tier - use the definite article with dans (in) but not with en ...