A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

History of computers, digital electronics, hardware manufacturers, and software developers.
Retro hardware generally: boards, extension cards, power supplies, peripherals. Use more specific tags as appropriate; use [case] instead for enclosures.
For questions about the different versions and products of the Commodore 64
261 questions
The Apple II series of personal computers and related software and hardware. Use [apple-iigs] for the Apple IIgs in particular, or [apple] for Apple hardware in general.
221 questions
MS-DOS, the Microsoft Disk Operating System, its OEM-branded versions, and x86 DOS clones in general.
208 questions
For questions about the early IBM PC, clones and compatible systems.
205 questions
For questions related to the Commodore Amiga family of personal computers.
203 questions
Assembly languages in general, of any architecture. Use with the particular processor’s tag as appropriate.
183 questions
Programming languages and constructs. Please check for language-specific tags first and use those instead, if applicable.
179 questions
For questions regarding graphical - as opposed to text - processing and display.
178 questions
For questions related to the use, restoration and imaging of floppy disks.
The Zilog Z80 microprocessor. Prefer [game-boy] instead for questions about the Game Boy CPU nicknamed the ‘GBZ80’.
161 questions
For questions about computer memory in a retrocomputing context
158 questions
Processes and software for emulating retro hardware (e.g. MAME, QEMU). NOT EVERY EMULATION QUESTION IS ON-TOPIC; SEE TAG WIKI.
157 questions
For 6502 series of processors, including hardware and assembly language questions. Use with [hardware] for the hardware interface in particular.
150 questions
BASIC: a high-level programming language favored in retro systems. For dialect-specific questions, use a tag such as [microsoft-basic], [applesoft-basic], etc.
135 questions
For questions about the different versions and products of the Sinclair ZX Spectrum computer
128 questions
For questions regarding hardware and drivers used for video output.
128 questions
For questions about Apple's Macintosh line of computers.
112 questions
Retro games, both hardware and software-based. NOT EVERY GAMING QUESTION IS ON-TOPIC. See tag wiki for guidance.
100 questions
For questions about the maintenance, usage, or history of retro keyboards.
99 questions
For questions about the applications and programs that can be run on retro devices (computers, etc.)
96 questions
For questions regarding the products of IBM, International Business Machines.
96 questions
For quesitons regarding Commodore Business Machines itself or its products that do not have a more specific tag such as commodore-64 or amiga.
96 questions
For questions about the different versions and products of the NES (Nintendo Entertainment System)
87 questions
For use when seeking identification of a game played on a retrocomputer.
85 questions
For general questions regarding operating systems on retrocomputers.
82 questions
82 questions
For questions about the Unix operating system.
81 questions
For questions about the different versions and products released by Nintendo
77 questions
Cathode Ray Tube monitors: principles of operation and use with computing devices. DO NOT REPAIR CRTs; SEE TAG WIKI FOR DETAILS.
76 questions
for questions about retrocomputing mainframes or clusters
75 questions
For questions about Read Only Memory.
70 questions
General questions about computer chips and chipsets in retro hardware. Use a specific chip’s tag instead if available.
70 questions
The C programming language: its historical aspects and use on/targetting retro platforms.
69 questions
For questions regarding the layout or mapping of memory in a retrocomputer.
68 questions
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