To be charitable, they may have meant something more like 'personal devices which people use directly'. (Though maybe not - it would be odd to exclude servers,

To be charitable, they may have meant something more like 'personal devices which people use directly'. (Though maybe not - it would be odd to exclude servers, which are one of Linux's biggest 'clients'. Perhaps they meant to exclude the more mundane types: routers, lightbulbs, etc.)