AIRPORTS: Remember when you didn't have to take your shoes off before getting on a plane? Remember when you could bring a bottled drink on board? Terrorism changed all that.
ALTERNATIVE MEDICINE: From acupuncture to herbal supplements to alternative ways of treating cancer, alternative medicine became more mainstream than ever.
APPS: There's an app for that! The phrase comes from Apple iPhone advertising, but could apply to the entire decade's gadget explosion, from laptops to GPS systems (want your car to give you directions to Mom's house in Chinese, or by a Frenchwoman named Virginie? There was an app for that.)
AARP cards ... for boomers! Some prominent Americans turned 50 this decade: Madonna. Prince. Ellen DeGeneres. The Smurfs. Michael Jackson — who also died at 50. And some prominent "early boomers" turned 60: Bruce Springsteen and Meryl Streep, for example.
AGING: Nobody seemed to look their age anymore: Clothes for 50-year-old women started looking more like clothes for 18-year-olds, tweens looked more like teens, long hair was popular for all ages, and in many ways women's fashion seemed to morph into one single age group.
Merry Christmas and have a Happy New Year! See you in 2010!