When we think of technology in terms of age, we often look at how long the machine has lasted for. Some machines from the mid-90's are still running, which makes them almost twenty years old. In terms of human life, that's not a very long time, but if you look at it in terms of quality working conditions, you'll find that these computers are kind of like dogs and cats. They may only be several years old, but in terms of actual age, their lifespan makes them much older than you realize.