linuxworld: shutting down application when window closes

["ramsubs" <ramsubs@pd.jaring.my>]

greetings all.

i came across this article in linuxworld.com:
http://www.linuxworld.com/ic_706716_6995_1-3133.html
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The DA's Office Goes Digital
At the Queens County District Attorney's Office, keeping track of all the
documents associated with the 50,000 criminal cases it processes each year
is a family affair. There, necessity is the mother of invention, funding is
the father, and the prodigal child turns out to be a penguin.

"One of the very few technical problems that arose with the Linux OS and the
custom interface stemmed from Linux's tendency to leave an application
running even when the application's window is closed. In Windows, closing
the window usually shuts down the application," said a much-enlightened
Kevin Hansen, ImageWork's president. Until ImageWork discovered and fixed
this quirk, users inadvertently launched multiple copies of the Linux
database and experienced some odd results. "
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can anyone throw any light on this matter?

sincerely,
ram
linux newbie