This question uses the adb tag as an example, but it applies to any acronym tag that doesn't have a universal and common usage (like, say, pdf).
adb is a new tag. I drafted a wiki and excerpt for it based on the usage so far (which refers to Android Debug Bridge). ADB already has multiple computer-related uses (as DavidPostill points out in a comment, also Advanced Debugger, and user2943160 mentions Apple Desktop Bus), so an acronym tag is just asking for misuse.
Based on adb already referring to multiple things, the logical approach is to have spelled-out tags for each use and an adb tag that advises users to pick the appropriate one.
- I could create a new android-debug-bridge tag, move the adb wiki contents to it, and retag the couple of existing questions.
- We don't yet have any questions about Advanced Debugger, so we can't create a tag for that. Apple Desktop Bus hasn't been in use for awhile, so we may not get new questions for that particular use at this point.
- Rather than synonomizing adb with a specific use, it should be turned into a "do not use" tag that guides readers to the appropriate choices. Right now, there's only one choice, so this would imply editing the wiki excerpt as other adb-related tags are created.
- As Ben N points out in his answer, more users think in terms of "adb" than "Android Debug Bridge", so simply deleting the adb tag may complicate tagging for users.
- I'm not aware of a way to link a tag to more than one other tag to preserve it, and I don't think synonomizing allows you to have a different wiki. It would also automatically link new question with the synonomized tag, which might be the wrong one.
What's the best general solution for acronym tags, especially when they are known, or likely, to refer to multiple things?
One thought: incorporate the acronym into the spelled-out tag. I don't know the limits on tag text (max characters, number of hyphenated terms, acceptable non-letter characters other than hyphen and I think period).
If each spelled out tag includes "adb", something like: android-debug-bridge...adb, they could potentially show up for selection when the user enters
adb. That isn't guaranteed, though. A maximum of 6 candidate tags are displayed when the user starts typing a tag, and I believe the displayed subset is based on popularity. There are currently 6 in addition to adb that contain that letter combination.