PPT Slide
A computer, usually, has three main parts (1) input devices
(keyboard, mouse etc.), (2) output devices (screen, printer etc.) and
(3) hard disc (external memory, motherboard, sound card etc.)
Central Processing Unit, or CPU is the heart of a computer.
Controls the operation of the entire system
performs the arithmetic and logic operations
stores and retrieves instructions and data
Arithmetical and logical operations are carried out by ALU
(Arithmetic Logic Unit) of the CPU.
RAM (Random Access Memory) or main memory is the place to
store the instructions and data of the programs being executed
ROM (Read Only Memory) is nonvolatile memory used to store
critical information, such as start-up instructions which is too