In Resume^x, Possessives^x

I quite agree with Curricula Vitae (being plural) as it is based on the use of a Latin phrase. A possible alternative is "Work History" as we speak English (not Latin) or resume (as point out by another poster).Also, if you see CV's this is wrong according to contemporary...

I presume you mean no indefinite article 'a' either, Elviajero? That leaves us with: (1) unspecified plurals: 'I love cats'; (2) nouns modified by a possessive, demonstrative, quantifier, etc: 'some/my/this/those cat/cats. They are likely to be some other cases that I have forgotten.