The first killer app, VisiCalc, came out in 1979. It turned an ordinary Apple II into a financial planning tool that was more powerful and flexible than anything the world had ever seen. A refined version of this spreadsheet, Lotus 1-2-3, became the killer app that put IBM PCs in offices and homes around the world. The Macintosh, which floundered in 1985 after early adopter sales trailed off, found a profitable niche in the new world of desktop publishing with two killer apps: Aldus Pagemaker and Adobe Photoshop.
To keep up with the Joneses, the Amiga needed a killer app to survive - it found one with the Video Toaster.
This series has been running for a long, long time, and is still every bit as great.