I've been noticing icons lately that sooner or later will be outdated.
Let me give you a few examples-
In MS Word, when I want to save a document, I click the diskette icon.
It's actually been years since I used the 3.5" diskette, but it's still
associated with "Save."
In a meeting last week we used the speaker phone for a conference call.
The on and off buttons showed a telephone handset oriented either
vertically (phone off receiver - On) or horizontally (phone on receiver
- Off).