IBM IntelliStation A Pro - External Connectors

IEEE 1394A (FireWire) connectors
Use these connectors (four-pin on the front and six-pin on the rear) to
connect FireWire devices, such as digital video cameras and external hard
disk drives.
Mic connector (pink)
Use this connector to connect a microphone to your computer when you
want to record voices or other sounds on the hard disk. You can also use
this connector (and a microphone) with speech recognition software.
Line out connector (green)
Use this connector to send audio signals from the computer to external
devices, such as speakers with built-in amplifiers, headphones, multimedia
keyboards, or the audio line-in jack on a stereo system.
USB ports
Use these connectors to connect USB devices to your computer, using
redundant Plug and Play technology.
Chapter 1. Introduction 7