While idly browsing, I have noticed we have a number of tags whose scopes significantly overlap, and should probably be merged:

• cpu vs microprocessor
• gaming vs game (resolved by creating a synonym, see Do we really need both [game] and [gaming] tags?)
• chassis vs case (I removed chassis from its only question, but there is still a wiki page for it, now gone completely)
• display vs screen
• nes vs famicom: see Should the Famicom and NES tags be synonyms?
• audio vs sound
• serial vs serial-port (I simply removed the latter tag from the only question that carried it)
• bugs vs glitches (this one is my fault, I made the former tag when the latter already existed; though ‘bug’ and ‘glitch’ are not necessarily synonymous either, see How can a Game Boy game "glitch-inherit" the music from a different game like this? for example)
• m68k vs motorola-68000
• emulation vs simulator

There’s also the question of what to do with maintenance vs restoration vs repair. Maintenance and repair are clearly distinct from each other, but ‘restoration’ can plausibly overlap with either, with both, or with neither. This can be discussed under Restoration and maintenance?