Windows: Open Settings > System > About > Processor
Windows: Open Task Manager > Performance > CPU
Windows: Press Win + R, type msinfo32, and check Processor
Windows: Open Command Prompt and run wmic cpu get name
Mac: Click the Apple menu > About This Mac
Mac: Open System Settings > General > About > Chip or Processor
Linux: Open Terminal and run lscpu
Linux: Open Terminal and run cat /proc/cpuinfo
Linux: Open System Information if available and check Processor
Chromebook: Open Settings > About ChromeOS > Additional details
iPhone or iPad: Check the device model online in Settings > General > About
Android: Open Settings > About phone > Processor or CPU information
Check the computer or device manual or manufacturer support page