what is windows terimal services

From: Umer Bin Saeed (humumer@yahoo.com)
Date: 01/06/03 

From: "Umer Bin Saeed" <humumer@yahoo.com>
Date: Sun, 5 Jan 2003 22:25:18 -0800

Hello
i am umer and want to know

what is windows terminal services and can somebuddy hack
my windows or passwords through windows terminal services
or not

plaease explain me from security point of view becuase my
windwos 220 are important for me even from my life

thanks
and waiting zealously
Umer