multiprogramming

Can you explain those two terms by giving simple Example of giving computer applications like listening song, surfing etc..... how We are Using multitasking and multiprogramming both (may be simultaneously) in computer system in daily life....

what is difference between :::::::::::::::::::: PROCESS , TASK , PROGRAM.:::::::::::::::::::; i really tried my books but could not find a real concrete answer. same is case with difference between MULTITASKING AND...