ZX-81 means Sinclair Timex personal computer, based on Z-80 microprocessor in
Hardware
Similar to ZX-81
3DDDI - 3-Dimensional Device Dependent Interface
3DRAM - Three-Dimensional Random Access Memory
486 - INTEL 80486 Microprocessor
4GT - 4 GigaByte
RAM Tuning
586 - Intel PENTIUM Processor
A - form A
normally open contacts
A-D - Analog to Digital
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