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.
520 questions
For questions about the different versions and products of the Commodore 64
277 questions
MS-DOS, the Microsoft Disk Operating System, its OEM-branded versions, and x86 DOS clones in general.
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.
240 questions
For questions about the early IBM PC, clones and compatible systems.
223 questions
Programming aspects of retro systems and historical programming languages. Please check for language-specific tags first and use those instead, if applicable.
213 questions
For questions related to the Commodore Amiga family of personal computers.
211 questions
Assembly languages in general, of any architecture. Use with the particular processor’s tag as appropriate.
206 questions
For questions regarding graphical - as opposed to text - processing and display.
194 questions
Use, restoration and imaging of floppy disks; low-level formats of floppy media. Consider [file-system] for high-level formatting.
189 questions
The Zilog Z80 microprocessor. Prefer [game-boy] instead for questions about the Game Boy CPU nicknamed the ‘GBZ80’.
173 questions
Processes and software for emulating retro hardware (e.g. MAME, QEMU). NOT EVERY EMULATION QUESTION IS ON-TOPIC; SEE TAG WIKI.
168 questions
For questions about computer memory in a retrocomputing context
168 questions
For 6502 series of processors, including hardware and assembly language questions. Use with [hardware] for the hardware interface in particular.
160 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.
155 questions
For questions regarding hardware and drivers used for video output.
141 questions
For questions about the different versions and products of the Sinclair ZX Spectrum computer
135 questions
For questions about Apple's Macintosh line of computers.
118 questions
Retro games, both hardware and software-based. NOT EVERY GAMING QUESTION IS ON-TOPIC. See tag wiki for guidance.
113 questions
For questions about the maintenance, usage, or history of retro keyboards.
108 questions
For questions about the applications and programs that can be run on retro devices (computers, etc.)
108 questions
For questions regarding the products of IBM, International Business Machines.
107 questions
Commodore Business Machines and their products. Use more specific tags like [commodore-64] or [amiga] instead if appropriate.
103 questions
Requests to identify a game played on a retro platform, based on appearance in media or a recollection. See tag wiki for guidance on identification questions.
102 questions
For questions about the Unix operating system.
92 questions
Operating systems on retrocomputers generally.
91 questions
For questions about the different versions and products of the NES (Nintendo Entertainment System)
90 questions
for questions about retrocomputing mainframes or clusters
83 questions
The C programming language: its historical aspects and use on/targetting retro platforms.
81 questions
For questions about the different versions and products released by Nintendo
80 questions
Cathode Ray Tube monitors: principles of operation and use with computing devices. DO NOT REPAIR CRTs; SEE TAG WIKI FOR DETAILS.
80 questions
Hard disk drives: hardware, connection, low-level format and drivers.
76 questions
For questions related to terminals such as WYSE, VT100 and Teletype.
74 questions
For questions about Read Only Memory.
74 questions
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