Typewriters
Much like film photography, typewriters are only for the most nostalgic of intellects. The fact that you cannot make any mistakes makes them pretty obsolete. Most normal people favor a good old word processor on their computers to jot down their thoughts or write their Great American Novel.
Card Catalog
Though libraries are still thriving, card catalogs have all gone virtual. The task of manually organzing each individual card according to the Dewey Decimal System is migraine-inducing. Now, you can quickly search any library's entire catalog online.