Computers adopt terms for physical analogues all the time. They're not always 1:1. Like "Desktop" for your background/icons in an OS. Or "window" for a portion of your screen than an application uses. Or "mouse" because it looks like a mouse. These terms get rolled into use and kinda take on a meaning of their own in the context of computers. I'm sure there's better examples of words that you'd never relate to their original meaning, but skimmer seems fine to me for this application.
