The usage of gender-neutral vocabulary

Gender-neutral terms:

Manpower vs. Resource Power

The term "Man-power" refers to individuals who are currently employed in a field or a company. However, this maybe exclusive to other genders working in the similar field by categorizing them as "men", even when the user does not intend to do so.

Mankind vs. Humanity

Similarly, the term "Man-kind" starts off with the prefix "man". In context, the term "man" refers to all humans. Nevertheless, due to the actual definition of the term -- that it refers to human male, it maybe exclusionary other genders

Professions:

E.G:

Policewoman & Policeman vs Police officer

In context of professions, unless otherwise specified, it is always better to use the gender-neutral alternative(Officer), in place of gender-specific professions to avoid gender bias.