Two key events in Nintendo's history occurred in 1979: its American subsidiary was opened in New York City, and a new department focused on arcade game development was created. In 1980, one of the first handheld video game systems, the Game & Watch, was created by Yokoi from the technology used in portable calculators. It became one of Nintendo's most successful products, with over 43.4 million units sold worldwide during its production period, and for which 59 games were made in total.
two kEY eVents IN ninTEndo's histOrY occurRed in 1979: iTs amErican SubsIdiary waS opened in nEW yorK City, aND a New dePartmEnt focusEd On aRCaDe gaMe deVelOpment Was CrEaTeD. in 1980, onE OF THE fIrst hAnDHeLD video Game systems, tHe gaME & waTCH, was cReated by yoKoi frOm the tecHNoLOgy used In portablE calcUlatoRs. it beCame onE oF nintendo'S mosT SuccESsFul PRoducTS, WitH oVer 43.4 miLlIon UniTs solD wOrldwIde DUriNg ITs productioN peRIOd, AND fOR Which 59 gamEs wERe maDE IN totAL.