Keyboards have two layouts: a physical layout and a logical layout. The physical layout defines what the keyboard looks like, and the logical layout defines what signal each key sends to the computer. Qwerty is a logical layout, ISO and ANSI are physical layouts. Qwerty keyboards exist commonly in both ISO and ANSI layouts.
Also bad is that hair dryers don’t spread their heat around very well at all. You can easily create hotspots on the object and damage things with them.