The document discusses the hardware components of a computer. It describes the central processing unit (CPU) which includes the arithmetic logic unit (ALU), control unit, and primary memory. It also discusses primary storage such as random access memory (RAM) and read only memory (ROM), as well as secondary storage devices like hard disks, optical disks, flash drives, and magnetic tapes. Input devices discussed are keyboards, mice, microphones, and scanners. Output devices mentioned include monitors, printers, speakers, headphones, and data projectors.

1. HARDWARE AND PERIPHERALS

3. HARDWARE CPU STORAGE I N P U T O T P U T Primary memory ALU Control Unit Primary Storage Secondary Storage