The "serial" part of the serial port's name describes how data is transmitted one bit at a time in a single line or "series." There were also parallel ports on computers that sent multiple bits ...

On the first PCs, the ports were contained on a stand-alone expansion card plugged into the ISA bus. Contrast with parallel port. See serial interface and RS-232. Faster, But Still Serial ...

A PC’s serial port provides signal lines that you can use to read voltage levels of digital circuits. You can use the port to test digital TTL (transistor-to-transistor-logic)-level circuits. You just ...

An image from H.D. Moore's presentation on serial server security vulnerabilities, showing an oil and gas infrastructure setup networked with serial port connections. (Click to enlarge.) You ...

Reminiscent of the serial terminal access controllers that were found in dumb terminal sites back in the day, it’s a box with eight DB-9 connectors for serial ports and a single RJ45 Ethernet port.

With Linux and the serial port there is good news and there is bad news. The good news is that Linux has great support for serial hardware of all sorts and a host of tools for accessing the serial … ...

Maybe you needed a PS/2 connector or a serial port, the Apple Desktop Bus, or a DIN connector; maybe a parallel port or SCSI or Firewire cable. If you’ve never heard of those things, and if you ...

Before USB ports became standard on PCs, several devices connected through a serial port. They're obsolete in many ways, but they still see some use.