In the early times, When computers on under development. Windows include some hidden fun feature on their system. They are called The Easter Egg. The Easter Egg acessed by various way vary on the version. The first Easter Egg included on Windows 1.0, Which features a window with a list of people who worked with software with a 'congrats'. The popular Easter Egg was on Windows 3.1, Windows95, 98 and Excel. Which include The 3d pinball, Flight simulator etc. Windows officialy stopped including The Easter Egg in 2002 by applying Microsoft Computing Initative for security and stability. Still some The Easter Egg have in todays Windows.