I have a spelling checker,
It came with my PC.
It plane lee marks four my revue
Miss steaks aye can knot sea.

Eye ran this poem threw it,
Your sure reel glad two no.
Its vary polished in it's weigh.
My checker tolled me sew.

A checker is a bless sing,
It freeze yew lodes of thyme.
It helps me right awl stiles two reed,
And aides me when aye rime.

Each frays come posed up on my screen
Eye trussed too bee a joule.
The checker pours o'er every word
To cheque sum spelling rule.

Bee fore a veiling checker's
Hour spelling mite decline,
And if we're lacks oar have a laps,
We wood bee maid too wine.

Butt now bee cause my spelling
Is checked with such grate flare,
Their are know fault's with in my cite,
Of nun eye am a wear.

Now spelling does knot phase me,
It does knot bring a tier.
My pay purrs awl due glad den
With wrapped word's fare as hear.

To rite with care is quite a feet
Of witch won should bee proud,
And wee mussed dew the best wee can,
Sew flaw's are knot aloud.

Sow ewe can sea why aye dew prays
Such soft wear four pea seas,
And why eye brake in two averse
Buy righting want too pleas.

--Dr. Jerrold H. Zar (webpage, Internet Archive mirror PDF PDF mirror)

Footnotes

• Citing under fair use
• Appeared in The Journal of Irreproducible Results (full citation mirror).
• Often misattributed to "Unknown", "Anonymous" and many unscrupulous poets.
• The node Ode to a Spellchecker contains several small alterations of this text. Since this text is hosted on the author's website, I consider that it supersedes the other.
• By the author's count, 127 out of 225 words in this poem are incorrect, although there are no orthographic errors.
• Several sites mention one Mark Eckman as the original author of the first two stanzas, although with a different spelling:
  

  I have a spelling checker
  It came with my PC
  It highlights for my review
  Mistakes I cannot sea.
  
  I ran this poem thru it
  I'm sure your pleased to no
  Its letter perfect in it's weigh
  My checker told me sew.

  These lines appeared originally in a daily e-mail digest for AT&T employees called AT&T Today. Eckman wrote them after a few weeks of debate over whether spell checker software should be used to help the less-skilled typists or that these typists should not write e-mails at all. Mr. Eckman is not mentioned at all in Dr. Zar's page

• 2019-11-28: Updated external links to proper Internet Archive mirrors