There are 4 basic operation of computer . (1.) Emptying - The process of entering data into computer system is called in putting it is done by input devices like keyboard ,mouse, sound, card, video capture ,card, digital camera, toy stick and light pen etc. (2.) Store - saving data and instruction is called storing computer stores data in its memory. (3.) Processing - performing at medical operation or logical operation on data in order to convert them into useful operation it is done by processor age pension 3 and 4. (4.) Outputing - the processor of producing Useful information or result for the user it is done by output devices like monitor, printer ,speaker etc.