Sinclair

Calculators, Home Computers

Models

Cambridge — Sinclair Cambridge (1973) — pocket calculator launched at £29.95, the cheapest of its type at introduction. Eight-digit display, four ICs, kit or pre-assembled.

QL — Unveiled in Munich on February 14 to a specialized audience, the Sinclair QL was positioned as a machine for 'the discerning private user, schools, and smaller businesses' ,…
ZX Microdrive — The ZX Microdrive arrived in late 1983 as Sinclair Research Ltd’s answer to the high cost of floppy disk drives, positioning itself as an economical alternative to…
ZX Spectrum +2A — The designation 'ZX Spectrum +2A' appears in documentation as part of a cluster of models, specifically the +2a.b and +3, produced not by Sinclair but by AMSTRAD.
ZX Spectrum +3 — The surviving documentation identifies the Sinclair Spectrum +3 solely through a single commercial listing, which confirms its branding, manufacturer, and price point at the…
ZX Spectrum 48K — The ZX Spectrum 48K emerged directly from Sinclair’s strategy of iterative refinement, incorporating all the proven features of the ZX81 while introducing high-resolution…
ZX80 (1980) — Sinclair ZX80 (1980): 4K ROM, 1K RAM, Z80 at 3.25MHz, under £100 — and a screen that blanks whenever the CPU thinks.
ZX81 (1981) — Sinclair ZX81 (1981): the £69.95 successor to the ZX80, 1K RAM expandable to 16K, 8K BASIC ROM, 50,000+ sold in three months.