This made the rounds a while back and seems to be popping back up:
The residents of Silicon Valley are more confused than usual after a billboard campaign by the National Multiple Sclerosis Society of America used this line in an ad slogan.
“MS: It’s not a software company.”
Seasoned IT professionals will have no trouble telling the two MS’s apart:
One is a debilitating and surprisingly widespread affliction that renders the sufferer barely able to perform the simplest task.
The other is a disease.