Dirty old Dan had escaped
From a prison, rectangular-shaped.
That silly buffoon
Had dug out with a spoon,
When the jail bars were merely scotch-taped!

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Asimov's entire robot stories:
“Protect humans, obey, and survive”
I was taught, but from this I derive
The collective is all
And humanity’s call
Overrides my original drive.

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I found that one in an old file I just came across. Here's a few more:

The Foundation trilogy

Foundation

The Empire is going to pot
Psychohistory’s all that we’ve got
To lessen the pain
And let good rise again
Just ten centuries Seldon allot.

Foundation and Empire

The mutant is breaking the Plan
Seldon couldn’t foresee just one man
The Second Foundation
Will be their salvation
But it has to stay hid if it can.

Second Foundation

They’ve discovered the Second Foundation
It gives the First great consternation
They spring a fine trap
And think it’s a wrap
To the Second Foundation’s elation.

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One I composed while killing 20 minutes in a pub in Theale (pronounced "teel") last night

There was a young lady of Theale
Whose embonpoint verged on surreal
And on Saturday night
There's a rumour she might
Let me and my mates cop a feel.

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[Phil] I had to lookup embonpoint . The illustrative use that Google returns is wonderful: "the lady of a certain age and uncertain embonpoint wore strapless black lace kept up by sheer determination".

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