Ode to Spell Checker

I have a spelling checker,

It came with my PC.

It plainly marks for my review

Mistakes I can not see.

I strike a key and type a word,

And wait for it to say

Whether I am wrong or right,

It shows me straight away.

As soon as a mistake is made,

It knows before too long.

And I can put the error right

It's hardly ever wrong.

I have run this poem through it,

And I'm sure you're pleased to know

It's letter perfect all the way

My checker told me so.