1)normal recording is also known as context sensitive 
recording.this is the default recording mode in qtp, which 
is used to record the operations on standard GUI 
objects.for each and every operation it generates
(statement) script. 
2)in analog recording we will record mouse and keyboard 
operations with respect to window or desktop co-
ordinates.here it generates single statement for all 
operations.
note:a)If u take desktop coordinates u may get wrong output 
if the application is moved from one place to another.
b)if u take window coordinates u will get the corrct output 
even the application is moved from one place to another.
3)low level recording is used to record the operations on 
the objects which are not recognised by the qtp.

1)Normal recording mode records the objects in your 
application and the operations performed on them.This mode 
is the objects in your application regardless of their 
location on the screen.
2)Analog recording mode enables you the exact mouse and 
keyboard operations you perform in relation to either the 
screen or the application window.In this recording 
mode,Quick test records and tracks every movement of the 
mouse as you drag the mouse around a screen or window.

       This mode is useful for recording operations that 
cannot be recorded at the level of an object, for example, 
recording a signature produced by draging the mouse.
3)Low lebel recording enables you to record on any object 
in your application,whether or not Quick test recognizes 
the specific object or the specific operation.
This mode records all run time objects as window or on an 
winobject or test objects.Use low level recording in an 
environment or on an object not recognized by Quick test.