Computer Definition, History, Operating Systems, & Facts
Miles Gordon Technology attempted to release a successor to the Spectrum known as the SAM Coupé in 1989, but this was not a commercial success. The Soviet Sonet Baltica ZX Spectrum CloneThe ZX Spectrum was extensively cloned in many countries, some machines with the involvement of Sinclair Research but large numbers with no official approval at all. The clones were particularly popular in Eastern Bloc countries, which at the time had only limited access to western markets, with dozens of Spectrum variants being produced. Spreadsheets were a common business tool prior to the personal computer but up until this time were created by hand. Updating a cell necessitated the manual re-calculation of all of the referencing cells. Dan Bricklin was watching a lecture at Harvard Business School where a spreadsheet was being tediously redrawn by hand and realised that the process could be automated with a computer.
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