Collect Pictures of Old Computers

Can you please post some pictures of old computers or old smartphones?
Because of doubling a next generation computer is always more powerful than all previous generations combined. Can you work together to create a slide showing such a comparison?
When a company announces their new product they usually mention how much faster it is than the older model. Apple's iPhone keynotes are a good example of this. Can you find examples on YouTube (or elsewhere) ?
Think back... what happens when something gets 50% or a 100% better year after year?