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Sinclair computers, derivatives, and clones (ZX80/81, ZX Spectrum, and QL clones)
Sinclair Research	ZX80 - ZX81 - ZX Spectrum, Spectrum+, Spectrum 128 - QL
Amstrad	ZX Spectrum +2 - ZX Spectrum +3
Timex Sinclair	TS 1000
Other	Jupiter Ace - One Per Desk - CST Thor - Q40/Q60
Sinclair Peripherals	ZX Printer - ZX Interface 1 - ZX Interface 2 - Microdrive