Windows: Settings > System > About > Processor
Windows: Task Manager > Performance > CPU
Windows: Control Panel > System and Security > System
Windows: Press Win + R, type msinfo32, press Enter
Windows: Open Command Prompt and run wmic cpu get name
Windows: Open PowerShell and run Get-CimInstance Win32_Processor | Select-Object Name
Mac: Apple menu > About This Mac
Mac: System Settings > General > About > Chip or Processor
Linux: Open Terminal and run lscpu
Linux: Open Terminal and run cat /proc/cpuinfo
Linux: Open Terminal and run uname -m
ChromeOS: Settings > About ChromeOS > Diagnostics
iPhone and iPad: Settings > General > About
Android: Settings > About phone > Processor or Hardware information