And if you were to go back a few more years into the past, you’d have found when you bought a mouse with a PS/2 connector fitted, it may well have come with an adapter for a 9-pin RS232 serial port.

Description: Use Tripp Lite B090-A9F-X to connect Servers to Tripp Lite B096-048 Console Server. Requires inexpensive Cat5/Cat6 patch cables between adapter and console server RJ45 ports. Features ...

Description: , UART, RS232, CAN and LIN (Optional) Low background noise, supports 1 mV/div to 10 V/div voltage scales 10 types of one-button shortcuts, including Auto Setup, Default, Cursors, Measure, ...