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A serial bus is a computer interface that transfers data one bit at a time, rather than in parallel streams. This method, while seemingly slower, is less susceptible to interference, allowing for higher speeds and simpler, slimmer cabling compared to older parallel interfaces.12

A prominent example is SATA (Serial ATA), which replaced the parallel ATA (PATA) interface. Early SATA versions transferred data at 150 megabytes per second, later upgraded to 300 MBps and then 600 MBps. SATA supports features like native command queuing and hot swapping, allowing components to be replaced while the computer is on. While not directly compatible with PATA hardware, SATA works with existing software drivers.1

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2 Britannica Sources
  1. SATA
  2. computer - Peripheral interfaces

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