(CNN) -- There are two certainties in airline seat pockets: pretzel crumbs and SkyMall. And while most travelers try to avoid the mysterious debris left by passengers past, SkyMall has been a welcome addition to the seatback catchalls since the 1990s. "I found that it was one of those things that anyone who had traveled in the United States kind of knew about," said Mike Barish, a freelance travel writer who reviews SkyMall products for the travel site Gadling. "Some people are in business class; some people are in economy ... some people like to travel, and some people hate it. But everybody knows SkyMall."
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SkyMall has been entertaining air passengers since its debut in 1990
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Founder Bob Worsley wanted to create a catalog of catalogs
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SkyMall's merchandising team receives hundreds of inquiries every week from vendors
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The best-selling items in catalog history were nose hair trimmer, mosquito trap
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