| cat | dog | |
| stick | automatic | transmission |
| ham | CB | radio |
| tubes | transistors | amplifiers |
| analog | digital | (meters, etc.) |
| HP | TI | calculators |
| RPN | algebraic | |
| Beta | VHS | |
| Macs | PCs | |
| Unix | Windows | |
| vim | emacs | |
| CDC | IBM | |
| Coke | Pepsi | |
| Hydrox | Oreos | |
| Beatles | Rolling Stones | |
| Addams Family | Munsters | |
| Burger King | McDonalds | |
| mayonnaise | Miracle Whip | |
| whipped cream | Cool Whip | |
| relish | salsa | |
| Reformed Baptist Church of God, Reformation of 1879 | Reformed Baptist Church of God, Reformation of 1915 |
Send me more.