A couple of days ago, I came across this question and noticed it's tag - untagged. When I looked at the questions list, it seems that many of these questions have been migrated from other sites (Electronics.SE in particular) and haven't been given any new tags on the new site.
Stack Overflow's untagged tag wiki states that this tag is:
a special tag that is designed to be used only by the system for questions that have had all of their other tags removed
for various reasons (in our case, mainly migration).
It also says:
You can help clean up some of these questions! If they're good questions, edit them to remove the untagged tag and add more descriptive tags. If they're not so good, use the usual tools: downvoting, flagging and voting to close/delete.
So, I think we should start cleaning up our untagged list. I've done a bit of editing myself, and I'd like it if the community could help me.
So, help me clean up our untagged pile! Edit the question to use the correct tags and fix any other mistakes while you're at it. If the question is a candidate for closing, flag or vote to close. Let's try and clear this tag so it has zero questions!