Article neglects to notice/mention the pun; It's simultaneously “Neko DA” as in desk accessory† and “nekoだ” as in ‘to be’‡, like “it's a cat” lol
† a specific type of application that could run alongside ‘real’ applications before the Mac had any multitasking: https://spinsidemacintosh.neocities.org/im202#im018
‡ https://en.wiktionary.org/wiki/%E3%81%A0#Verb