PS/2 Cable (Personal System/2) port, also referred to as the mouse port or keyboard port, was develop by IBM.

It is use to connect a computer mouse or keyboard to an IBM compatible computer.

The PS/2 port is a mini-DIN plug that contains six pins and is still sometimes found on all IBM compatible computers.

 PS/2 was an IBM computer introduces in 1987.

It featured improved graphics, a 3.5-inch diskette drive, a proprietary bus to help prevent clone makers competition, and a bidirectional 8-bit port.

A Personal System/2 (PS/2) connector is a 6-pin connector used to connect peripheral devices, usually a mouse or keyboard, with a computer.

Its name comes from the IBM series of personal computers, known as the Personal System/2.

The PS/2 connector is the replacement of an older standard, DE 9 RS.232, used for mouse and keyboard connections.

Normally PS/2 connectors are available in two different sizes or shapes. One is 1/4 of an inch in diameter and other is 3/8 of an inch.

Both sizes are on the market, but the smaller one is more commonly used.

USB connectors have almost entirely replaced PS/2 connectors as the primary means of hooking up computer devices.

PS/2 Cable(Personal System/2) 6 pin PS/2 specifications

1+2.0 to +5.5vKeyboard Data
2+4.8 to +5.5vReserved
4+2.0 to +5.5v+5.0V DC
5+2.0 to +5.5vKeyboard Clock
6+2.0 to +5.5vReserved

PS/2 originally had very few weak points regarding software and hardware.

Software problems began cropping up in 2010 because most drivers quit supporting PS/2 connectors.

This issue cannot be solved with the use of an adapter.