Serial and parallel communication

Serial and parallel communication are two methods used to transfer digital data between devices. In serial communication, bits are sent one after another over a single data line, requiring fewer wires and making it ideal for long distances and high-speed links. Common examples include USB, UART, SPI, and I²C. In parallel communication, multiple bits are transmitted simultaneously using separate data lines, allowing faster transfer over short distances but requiring more wiring. Examples include PCI, PATA, and SCSI. Serial communication is widely used in modern electronics because it is simpler, cheaper, and less affected by timing issues.