The third-person singular neuter personal pronoun used to refer to an inanimate object, abstract entity, or non-human living thing.
A third-person singular personal pronoun used to refer to a baby or child, especially of unknown gender.
(obsolete) An affectionate third-person singular personal pronoun.
A third-person singular personal pronoun used to refer to an animate referent who is transgender or non-binary.
Used to refer to someone being identified, often on the phone, but not limited to this situation.
The impersonal pronoun, used without referent as the subject of an impersonal verb or statement (known as the dummy pronoun, dummy it or weather it).
The impersonal pronoun, used without referent, or with unstated but contextually implied referent, in various short idioms or expressions.
The impersonal pronoun, used without referent, or with unstated but contextually implied referent, in various short idioms or expressions.
The impersonal pronoun, used without referent, or with unstated but contextually implied referent, in various short idioms or expressions.
Sex appeal, especially that which goes beyond physical appearance.
The impersonal pronoun, used as a placeholder for a delayed subject, or less commonly, object; known as the dummy pronoun (according to some definitions), anticipatory it or, more formally in linguistics, a syntactic expletive. The delayed subject is commonly a to-infinitive, a gerund, or a noun clause introduced by a subordinating conjunction.
All or the end; something after which there is no more.
(obsolete) Followed by an omitted and understood relative pronoun: That which; what.

Its.

One who is neither a he nor a she; a creature; a dehumanized being.
The person who chases and tries to catch the other players in the playground game of tag.
A game of tag.
(informal) A desirable characteristic, as being fashionable.
(informal) Sexual intercourse.
(informal) Sex appeal.
Alternative letter-case form of It (“force in the vitalist approach of Georg Groddeck”)
Alternative letter-case form of It (“the id”)

Most fashionable, popular, or in vogue.

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Besides encryption, it can also be used for authentication.