To be fair, despite the title, the article does describe digital mechanical calculators as "digital." An amusing aside, amongst electronics and audio people, t

To be fair, despite the title, the article does describe digital mechanical calculators as "digital." An amusing aside, amongst electronics and audio people, there's an ongoing debate about whether a switchmode power supply or amplifier is "digital." Also, when CD players first came out, I was in a stereo shop, and some speakers were labeled as "digital ready."