Potential answers for "Mechanical calculator pioneer"

⭐⭐⭐⭐ PASCAL
⭐⭐⭐ CASIO
⭐⭐⭐ ADDINGMACHINE
⭐⭐ SLIDERULE
⭐ ADDEND
⭐ ELY
⭐ IRONLUNG
⭐ ATARI

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