24Microphone jack. This Mic (pink) jack connects a microphone. (on audio models only)

25Line In jack. This Line In (light blue) jack connects a tape player or other audio sources. (on audio models only)

26Line Out jack. This Line Out (lime) jack connects a headphone or a speaker. (on audio models only)

27Serial port. This 9-pin COM1 port is for pointing devices or other serial devices.

28USB ports. These two 4-pin Universal Serial Bus (USB) ports are available for connecting USB devices such as a mouse and PDA. A USB header is also available for two additional USB ports.

29PS/2 keyboard port. This purple 6-pin connector is for a PS/2 keyboard.

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Chapter 1: Product introduction