The Start Menu of Windows 7 (and Vista)
The Start Menu in Windows 8
Many people are thinking that Start Button is mission Than i thought to write about it.Actually Start  Button is not missing ,Microsoft has tried to bring something new.They have created a wonderful OS as Android was growing much faster than Windows. 
They now have created a shortcut for Desktop where you can find the most frequently used software and hence there was no need of Start Button in Windows 8. Actually it's a good idea but people are not accepting it as they got used to the Start Button, which they were using for many years.

Windows Start Button was Introduced in there First OS which was Windows 95 , in starting it was of rectangular shape,than they came up with a circular Button (in windows 7 and vista) and now they vanished it
If you want to Windows Start Menu again than you may use Third Party Utilities available on internet. They will gibe you a nice feeling. But according to me there is no use of installing Start Menu Button as there is no need of it. Already a hidden option is given in windows 8 that is Desktop option. Just Right click at corner and click on Desktop optoin
This menu provides almost all the things which Start Menu was doing in previous versions of Windows. You may find direct access  to Control panel , X-Box , Internet Explorer and of course the beautiful Tiles of Frequently used Software.