Types of Serial Communication
1.RS 232 - Peer to peer (i.e communication between two device)
2.RS-485 Multi point (communication between two or more devices)
3.USB (Universal serial bus) Replaced RS232 on desktop computers
4.CAN (Control Area Network) Multi point.Popular in automotive industry
5.SPI (Serial Peripheral Interface) Synchronous master/slave communication
6.I2C (Inter-Integrated Circuit) Multi master communication.Also called two wire interface.