Apostrophe in a sentence as a noun

Some of my credit cards have the apostrophe and some don't.

Our post linking to the target site had an apostrophe in its title...

"Ah, but what if there was an apostrophe inside a quote inside a quote in 'Billy's Novel'?

In all other cases, it is the right place to use an apostrophe:* ...about to be placed in Fat Man's casing.

But I have to say that my grammar is not strong enough to tell you right now with clarity when an apostrophe S is used.

Because it's backwards of how apostrophes normally work.

I don't know what's worse: the privacy implications, the bandwidth implications or using the apostrophe to mean "here comes an s".

Not that this answers any part of the question, but I just created a redirect on Wikipedia for people who link without the apostrophe.

One employer's system set email addresses from your name in the payroll system, and believe me, you really don't want an email address with an apostrophe in it.

‘Smart quotes’ are actually more typographically ‘correct’; that key on your keyboard is a prime symbol which is NOT the same as an apostrophe or a single quote mark.

Yes, after my repulsion at the idea of Zynga clawing back early stock options, my second thought is that I can't respect a founder who writes to employees in lowercase and doesn't know how to use an apostrophe.

Apostrophe definitions

noun

address to an absent or imaginary person

noun

the mark (') used to indicate the omission of one or more letters from a printed word