Change is hard. But efficiency is good. While boom years gives us radical innovation and improve consumer choice, recessions help us focus on what's really important and accelerate the demise of technologies and companies that are already obsolete.

So say good-bye to these 10 things, and say hello (eventually) to a new economy, a new boom and a new way of doing things.

Mike Elgan writes about technology and global tech culture. He blogs about the technology needs, desires and successes of mobile warriors in his Computerworld blog, The World Is My Office . Contact Mike at mike.elgan@elgan.com , follow him on Twitter or his blog, The Raw Feed .