Web Browsers.

So I like to use Google Chrome as my main browser.  My grandmother, who isn't very tech savvy, had no idea there were other web browsers other than the one she uses, Safari.  I had to show that there are other options and why people would prefer those options over the default that come with your operating system.  But if you think about it, why would she need to understand this.  It's not that important and it doesn't even matter.  Safari does what she wants and that is what is useful to her.  Also, people of her generation didn't grow up with computers and the technology we have today.  It is new to them.