HS COM is a serial communication library implemented in C language. HS COM runs on Windows and interfaces to Win32 serial communication API. HS COM allows applications communicate with any device presented in the OS as a COM port. The physical interface may in be RS232, USB, IRDA, Bluetooth, etc. HS COM supports working concurrently with 100 COM ports (COM1 to COM100) The use of HS COM C Source Library is Royalty Free.