Analog recording:it records keyboard inputand the precise 
x,y co-ordinates travelled by the mouse pointer across the 
screen

Low level recording:here it is based on mouse clicks and 
the x,y co-ordinates.that is instead of taking that 
object,it will take the x,y co-ordinates of that object

analog recording: it records the mouse movements and 
keyboard movements in a script.when the script is run,it 
shows whatever actions have been done like wherever the  
mouse has moved or clicked.

low level recording :it is used in case qtp is unable to 
recognise some objects and its properties.
it can take both objects and x,y coordinates.