serial port driver implemented

Successfully implemented Parallel Port:Byte mode according to the protocol.

implemented parallel port in compatibility and nibble mode Succesfully..

message queue with multiple clients implemented

pipes is implemented with multiple clients using signals.

client server implemented with pipes using signals and handlers

socket implemented with UNIX

Completed with pipes and FIFO.

shell script assignment 1 is completed and uploaded.  

Assignments 1,2,3 are completed and uploaded.