I want ppt on pc based voice announcement system

My project name is pc based voice announcement system.we are having Rs232 protocal nd max232 nd Ic AT89c52 nd speaker nd voice module . Rs232 is given to data to max232 it convert cmos logic to ttl logic then it goes to the microcontroler .so this received some data then controler is doing that work mean announce the data nd the voice module recognize nd announcing data using speakers

Name : Bitla.swetha
father's name:bitla.prabhakar
address : lalbazar
secunderabad
email-swethabitla7[at]gmail.com

I want ppt and documenation for pc based voice announcement system.can anyone pls send them to my mail id pls....
my mail:nikhila95vanam[at]gmail.com