計算機・計算器|けいさんきkeisanki

1. nouncalculator
   最初さいしょの電気でんき計算器けいさんきは１９世紀末せいきまつに出現しゅつげんした。↗

   The first electric calculator came into existence toward the end of the 19th century.
2. nouncomputer

• Synonym電算機でんさんきWrittenWritten register: an abbreviation of 「電子計算機」, found mostly in institution names; 「計算機」, by contrast, can also mean a calculator.
• Synonym電子計算機でんしけいさんきWrittenThe formal full name for an electronic computer, used mainly in laws and official documents; 「計算機」 is the shorter form.
• SynonymコンピュータNeutralThe everyday loanword for a computer; next to it, 「計算機」 sounds academic or old-fashioned.
• Related電脳でんのうNeutralA kanji word for computer with a sci-fi, Chinese-style flavor, as in 「電脳空間」; 「計算機」 is a plain academic term.

For computers in daily speech use 「コンピューター」 (a PC is 「パソコン」) and for calculators 「電卓」. Keep 「計算機」 for academic contexts like 「計算機科学」; use 「電子計算機」 in official documents, and 「電算機」 mainly within institution names.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 計算けいさんを行おこなう機械きかい。算盤そろばん、計算尺けいさんじゃく、計算けいさん図表ずひょう、卓上たくじょう計算機けいさんきなどがある。