Timex Sinclair was a joint venture established between Sinclair Research and Timex Corporation in an effort to gain an entry into the rapidly growing early-1980s home computer market in North America. They produced 2 modified versions of the ZX81:
*TS 1000, introduced in July 1982 and essentially a modified ZX81 with 2 KB RAM.
*TS 1500, introduced in August 1983, it was a TS 1000 with 16 KiB KB RAM and a ZX Spectrum-like case and keyboard.
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