<P> Final version . First to require IO - APICs to be enabled on all desktop systems . Places a greatly increased emphasis on legacy - reduced and legacy - free systems . Some "legacy" items such as ISA expansion slots and device dependence on MS - DOS are forbidden entirely, while others are merely strongly discouraged . </P> <P> Perhaps the most end - user visible and lasting impact of PC 99 was that it introduced a color code for the various standard types of plugs and connectors used on PCs . As many of the connectors look very similar, particularly to a novice PC user, this made it far easier for people to connect peripherals to the correct ports on a PC . This color code was gradually adopted by almost all PC and motherboard manufacturers . Some of the color codes have also been widely adopted by peripheral manufacturers . </P> <Table> <Tr> <Th_colspan="2"> Color </Th> <Th> Function </Th> <Th> Connector on PC </Th> </Tr> <Tr> <Th_colspan="5"> Mouse and keyboard </Th> </Tr> <Tr> <Th> </Th> <Th> Green </Th> <Td> PS / 2 mouse / pointing device </Td> <Td> 6 - pin mini-DIN female </Td> </Tr> <Tr> <Th> </Th> <Th> Purple </Th> <Td> PS / 2 keyboard </Td> <Td> 6 - pin mini-DIN female </Td> </Tr> <Tr> <Th> </Th> <Th> Gold </Th> <Td> Game port / MIDI </Td> <Td> 15 - pin D female </Td> </Tr> <Tr> <Th_colspan="5"> General input / output </Th> </Tr> <Tr> <Th> </Th> <Th> White </Th> <Td> USB 1 low speed and full speed </Td> <Td> USB Type A receptacle </Td> </Tr> <Tr> <Th> </Th> <Th> Black </Th> <Td> USB 2.0 high speed </Td> <Td> USB Type A receptacle </Td> </Tr> <Tr> <Th> </Th> <Th> Sky blue </Th> <Td> USB 3.0 SuperSpeed </Td> <Td> USB Type A SuperSpeed receptacle </Td> </Tr> <Tr> <Th> </Th> <Th> Yellow </Th> <Td> USB 3.0 SuperSpeed Always On even if the PC is turned off </Td> <Td> USB Type A SuperSpeed receptacle </Td> </Tr> <Tr> <Th> </Th> <Th> Red </Th> <Td> High - power USB (more than 500 mA current available) </Td> <Td> USB Type A receptacle </Td> </Tr> <Tr> <Th> </Th> <Th> Grey </Th> <Td> IEEE 1394 (FireWire) </Td> <Td> 6 - pin FireWire 400 or 9 - pin FireWire 800 </Td> </Tr> <Tr> <Th> </Th> <Th> Burgundy </Th> <Td> Parallel port </Td> <Td> 25 - pin D female </Td> </Tr> <Tr> <Th> </Th> <Th> Teal or turquoise </Th> <Td> Serial port </Td> <Td> 9 - pin D male </Td> </Tr> <Tr> <Th_colspan="5"> Video </Th> </Tr> <Tr> <Th> </Th> <Th> Blue </Th> <Td> Analog monitor </Td> <Td> 15 - pin VGA female </Td> </Tr> <Tr> <Th> </Th> <Th> White </Th> <Td> Digital monitor </Td> <Td> DVI female </Td> </Tr> <Tr> <Th> </Th> <Th> Yellow </Th> <Td> S - Video </Td> <Td> 4 - pin mini-DIN </Td> </Tr> <Tr> <Th> </Th> <Th> Yellow </Th> <Td> Composite video </Td> <Td> RCA jack </Td> </Tr> <Tr> <Th> </Th> <Th> Black </Th> <Td> Digital audio / video </Td> <Td> HDMI or DisplayPort female </Td> </Tr> <Tr> <Th_colspan="5"> Audio </Th> </Tr> <Tr> <Th> </Th> <Th> Pink </Th> <Td> Analog microphone audio input (mono or stereo) </Td> <Td> 3.5 mm TRS </Td> </Tr> <Tr> <Th> </Th> <Th> Light blue </Th> <Td> Analog line level audio input </Td> <Td> 3.5 mm TRS </Td> </Tr> <Tr> <Th> </Th> <Th> Lime green </Th> <Td> Analog line level audio output, front stereo (speakers or headphones) </Td> <Td> 3.5 mm TRS </Td> </Tr> <Tr> <Th> </Th> <Th> Black </Th> <Td> Analog line level audio output, rear stereo (surround speakers) </Td> <Td> 3.5 mm TRS </Td> </Tr> <Tr> <Th> </Th> <Th> Orange </Th> <Td> Analog line level audio output, center and subwoofer (surround speakers) </Td> <Td> 3.5 mm TRS </Td> </Tr> <Tr> <Th> </Th> <Th> Silver </Th> <Td> Analog line level audio output, side stereo (surround speakers) </Td> <Td> 3.5 mm TRS </Td> </Tr> <Tr> <Th> </Th> <Th> Orange </Th> <Td> Digital audio output (coaxial S / PDIF) </Td> <Td> RCA connector </Td> </Tr> <Tr> <Th> </Th> <Th> Black </Th> <Td> Digital audio output (optical S / PDIF) </Td> <Td> TOSLINK </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Color </Th> <Th> Function </Th> <Th> Connector on PC </Th> </Tr>

What is the color of the speaker jack on a computer
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