How would someone know what the trio of "min, max, close" buttons do on Windows? The smartphone market has reached a level of maturity and ubiquity that we can

How would someone know what the trio of "min, max, close" buttons do on Windows? The smartphone market has reached a level of maturity and ubiquity that we can start setting down a baseline for knowledge, and build on top of it. It happened to the PC before, and it's happening to smartphones now. The original iPhone was criticized (especially in demographics like ours) for being insultingly shallow and toy-like. This is the smartphone becoming more complex now that (nearly) everyone has had a go.