It's tax day. No joke.

A taxpayer received a strongly worded "second notice" that his taxes were overdue. Hastening to the collector's office, he paid his bill, saying apologetically that he had overlooked the first notice.
"Oh," confided the collector with a smile, "we don't send out first notices. We have found that the second notices are more effective."

*****

When NASA first started sending up astronauts, they quickly discovered that ball-point pens would not work in zero gravity.
To combat this problem, NASA scientists spent a decade and $12 billion developing a pen that writes in zero gravity, upside down, underwater, on almost any surface including glass and at temperatures ranging from below freezing to over 300° C.
The Russians use a pencil.

"The avoidance of taxes is the only intellectual pursuit that still carries any reward."
- John Maynard Keynes