noun
logarithm table; log table
A reference table listing logarithm values, used in mathematics before electronic calculators became common.
昔は計算に対数表を使った。
In the past, people used logarithm tables for calculations.
計算尺 is a slide rule, another pre-calculator tool that also relies on logarithmic scales.
Compound of 対数 (logarithm) and 表 (table).