Chuck Blore, the programmer who oversaw KFWB's switch from MOR to top 40 in January 1958, came up with a promo to convey to listeners that rock'n'roll wasn't just for teenagers -- adults could enjoy it too. Two or three times an hour, listeners heard a young girl declaring that her "mommy listens to KFWB." After six months, KFWB had a 50 share. Of all the people listening to radio at a given moment, 50% of them were listening to KFWB. Wow! Program directors today get excited if their station manages a 5 share! Here is a KFWB bumper sticker from circa 1963: