Post it ..success story

3M Corporation had a problem with glue it had invented; it did not stick things together effectively. Then one of its chemists, Arthur Frye, thought a way of combining the glue with a bookmark, which is something you want to move from page to page, so glue that did not stick too strongly would be appropriate. His combination was the Post-it-note.
3M launched the product in 1977 but it failed as consumers had not tried the product. A year later 3M issued free samples to residents of Boise, Idaho, United States. 90% of people who tried them said that they would buy the product.
By 1980 the product was being sold nationwide in the US; a year later Post-its were launched in Canada and Europe.

Letters

ITS A 7 LETTER WORD.
IF WE REMOVE 1 LETTER FROM IT, IT REMAINS SAME.
IF WE REMOVE 2 LETTERS FROM IT, IT REMAINS SAME.
IF WE REMOVE 3 LETTERS FROM IT, IT REMAINS SAME.
IF WE REMOVE ALL THE LETTERS FROM IT, STILL IT REMAINS SAME.
WHATZ IT ?

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POSTBOX