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
238 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.
211 questions
For questions related to the Commodore Amiga family of personal computers.
185 questions
MS-DOS, the Microsoft Disk Operating System, and its OEM-branded versions. Use [dos] instead for the x86 DOS family in general.
175 questions
For questions about the early IBM PC, clones and compatible systems.
173 questions
For questions related to the use, restoration and imaging of floppy disks.
163 questions
For questions regarding graphical - as opposed to text - processing and display.
160 questions
Assembly languages in general, of any architecture. Use with the particular processor’s tag as appropriate.
Processes and software for emulating retro hardware (e.g. MAME, QEMU). NOT EVERY EMULATION QUESTION IS ON-TOPIC; SEE TAG WIKI.
148 questions
For questions regarding the Zilog Z80 microprocessor
Programming languages and constructs. Please check for language-specific tags first and use those instead, if applicable.
144 questions
For questions about computer memory in a retrocomputing context
144 questions
For 6502 series of processors, including hardware and assembly language questions. Use with [hardware] for the hardware interface in particular.
127 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.
122 questions
For questions about the different versions and products of the Sinclair ZX Spectrum computer
119 questions
For questions regarding hardware and drivers used for video output.
116 questions
For questions about Apple's Macintosh line of computers.
105 questions
For questions regarding the products of IBM, International Business Machines.
For questions about the applications and programs that can be run on retro devices (computers, etc.)
88 questions
For questions about the maintenance, usage, or history of retro keyboards.
87 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.
87 questions
Retro games, both hardware and software-based. NOT EVERY GAMING QUESTION IS ON-TOPIC. See tag wiki for guidance.
87 questions
For general questions regarding operating systems on retrocomputers.
76 questions
For questions about the different versions and products of the NES (Nintendo Entertainment System)
75 questions
75 questions
For questions about the Unix operating system.
71 questions
For questions about the different versions and products released by Nintendo
70 questions
for questions about retrocomputing mainframes or clusters
For use when seeking identification of a game played on a retrocomputer.
69 questions
For questions regarding Cathode Ray Tube monitors
69 questions
General questions about computer chips and chipsets in retro hardware. Use a specific chip’s tag instead if available.
67 questions
For questions about Read Only Memory.
66 questions
For questions about retrocomputing hardware and software created by Intel
62 questions
For questions regarding hard disk drive usage. The hardware, connection, format and drivers.
62 questions
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