Notebook vs Laptop is a term that is sometimes confusing for some people.
they thought,if this was a term only to express something are actually the same and it makes no difference.
If you want to buy a laptop or notebook then it would be nice you know and understand clearly what it is laptop and what is a notebook.
knowledge of this term will make us better understand whether the laptop and what is a notebook.
with this knowledge we will also understand the terms of advantages and disadvantages of laptops and notebooks.

Many of us refer to a portable computer as a 'laptop', while this is not technically the correct term
in many cases. Here we examine the difference between the 'laptop' and 'notebook' definitions.

In the computer of the 1980s and early 1990s, became widely available portable.
They all called 'laptop' and they are heavier than we've become accustomed.
Prior to this, portable computers only is in a very large 'suitcase' machine is quite heavy.
As laptop computers become smaller during the 1990s the terms notebook computers began to appear.
Most portable computers manufacturers will now refer to their product as a 'notebook' instead of 'laptop'.
term 'notebook' has partially replaced the term 'laptop' because of 'heavier' machines are no longer being made.

In general, the computer 'notebook' will have most of these features:

      -     Maximum 14 inch TFT screen

      -     Ultra-light and very low profile (ie. thin) 

      -     4 hours of battery life 

      -     No internal floppy drive 

      -     Minimal graphics subsystem 

      -     Low power consumption processor

      -     Integrated modem/network connections 

      -     Smallest possible keyboard (retaining functionality)

The problem with a notebook computer is that, in order to have a high specification, they come at a cost. 
Many ‘notebook’ computers cannot actually be used on your ‘lap’, so they cannot really be 

described as a ‘laptop’ – this is because the main cooling air fan inlet is on the bottom. 
we would suggest that when you are actually intending to use your notebook computer on your knees, then
you should place a small board (even a tray) underneath it. 
‘Laptop’ computers realistically do not exist anymore, they are being referred to as ‘desktop 
replacement’ computers.  They are designed to offer desktop performance, but still be portable.  

Traditionally, a ‘laptop’ computer would have had most of these features: 

      -     14 inch to 17 inch TFT screen 

      -     a more powerful graphics subsystem such as using vga with nvidia chipset or ATI Radeon 

      -     Internal DVD-ROM or DVD-RW drive 

      -     Large full-featured keyboard 

      -     Low power consumption processor

      -     Upgradeability (within some restrictions) 

      -     Integrated modem, network and Wi-Fi capabilities 

      -     High quality integrated audio/speaker system 

      -     2 hours or more battery life 

Most people, however, still refer to their ‘notebook’ as a ‘laptop’ and numerous retailers still call them ‘laptops’. 
The terms are used interchangeably and could be used either way. 
Because of the advances in portable computing, the definitions have become fuzzy and it is a matter of opinion as to which you  call your computer.The layman will probably always refer to it as a ‘laptop’.

I hope this brief description is useful to increase knowledge and better understanding of the differences are also advantages and disadvantages of Notebook vs Laptop.