Getty Images, Stacy Perman, Vidler
Tastes change, technology advances, the economy gyrates. The conventional wisdom holds that businesses must adapt or die. Indeed, the scrap heap of history is littered with once best-selling concepts that failed to remain relevant. However, a handful of businesses have bucked the odds and survived over decades without making major changes to their products or services. Flip through this slide show to view those die-hards that are still hanging on--and in some cases making a tiny comeback. Their motto seems to be: Never say die, or rather, everything old is new again.