text: a portable computer 10 , shown in fig1 may include a keyboard housing 12 and a display housing 14 which may be hingedly connected . a digital camera 16 is mountable within a housing of the computer 10 for translation into and out of the housing . the camera 16 may reciprocate in the illustrated embodiment from a first position ( shown in dashed lines ), concealed within the housing 14 , for example , to a second position extending outwardly from said housing 14 for taking digital still or movie pictures . the camera 16 may include a translating component 18 having a camera lens 20 mounted thereon . the electronics for implementing the digital camera may be movable with the component 18 or they may be retained inside either the housing 12 or 14 , communicating electrically with the lens 20 and associated imaging array . for example , an image processor may be located in proximity to the processor of the computer 10 . a cable may extend from the housing 12 to the lens 20 to communicate with an imaging array associated with the lens 20 . multiple cameras may be mounted in a single computer system 10 . the component 18 is advantageously mounted so that it extends substantially completely within the housing 12 or 14 and releasably locks therein . when actuated inwardly from this position , the component 18 springs outwardly to its fully extended position , shown in solid lines in fig1 . when pushed back into the housing ( but not over extended into the housing ), the component 18 again locks in its concealed position within the housing . a variety of known techniques are available for implementing this type of push - button operation . one exemplary embodiment , shown in fig8 includes a catch 28 mounted on a cantilevered spring arm 22 . when the component 18 is fully extended into the housing 14 , the catch 28 engages a groove 34 in the component 18 . when the component 18 is extended further into the housing 14 , a cam 32 engages a cam 30 on the arm 22 , disengaging the catch 28 from the groove 34 . in this position , a coiled spring 24 is tightly coiled , so that once the catch 28 is disengaged , the component 18 is forcefully ejected from the housing 14 . because the cam 32 presses upwardly on the arm 22 , by the time the spring arm 22 springs back to the position shown in fig8 the component 18 has already gone past the catch 28 and has assumed the position shown in fig9 . in fig9 the component 18 is spring biased to the outwardly extending position so that when the component 18 is returned into its housing , the spring 24 is compressed . in the position shown in fig9 an electrical contact may be made , for example , between the arm 32 and the catch 28 which contact completes an electrical circuit including the wires 36 . in this way , the outward operation of the camera 16 can also provide power to the camera 16 . as a result , the camera 16 may be powered only when it is ready for use ; that is , in one operation , the camera may be both extended and turned on . referring next to fig2 another orientation of a digital camera with respect to a portable computer is illustrated . in this case , the portable computer 10 a has a camera 16 a which translates into and out of the upper edge of the display housing 14 in a direction transverse to that utilized in connection with the camera 16 . the camera lens 20 is then oriented at a higher position on the housing 14 when the component 18 a is extended outwardly . fig3 shows still another embodiment of a camera 16 b in a portable computer 10 b . instead of reciprocating , the component 18 b rotates out of the housing 14 through an arc of about 90 ° in the illustrated embodiment . that is , the camera rotates from the dashed line position shown inside the housing 14 to the solid line position shown extending outwardly of the housing 14 . the mechanism for locking and extending the camera may be substantially as described previously except that instead of spring biasing the camera for reciprocation , the spring simply rotates the camera around a hinge 21 . turning next to fig4 a camera may be mounted for rotation out of the housing 12 from a first vertical orientation transverse to the keyboard 15 to a second vertical orientation sitting up on the keyboard housing 12 and rotated 180 ° from its stored position . in this orientation , the camera 16 c is out of the way of the display 14 . the camera 16 c may overlap the computer housing 12 to some degree and extend outwardly to the side of the housings 12 and 14 . as shown in fig5 and 6 , an outward portion 38 of in the component 18 may rotate around an axis extending generally parallel to the length of the component 18 so that the lens 20 may be oriented in a desired way to record an image . thus , in fig5 the lens 20 is shown pointing straight upwardly , and in fig6 the lens 20 is shown facing oppositely from the orientation shown in fig1 . referring now to fig1 , the component 18 may include a pair of hingedly connected portions 38 and 40 connected by a rotatable tube 42 . the tube allows relative rotation between the portions 38 and 40 . electrical continuity may be maintained by extending a conductor 44 through the interior of the tube 42 . the conductor 44 may couple the imaging array 74 to the image processor 76 inside a housing 12 or 14 . if desired , the portion 38 may be detachable from the rest of the component 18 . this may be achieved by sliding the portion 38 off of the tube 42 and allowing the connecting wire 44 to feed out of the remainder of the housing so that the lens 20 may be placed at a location remote from the rest of the computer 10 . in addition , the portion 38 may be provided with an wireless link to a receiver within the computer system 10 so that once detached , the portion 38 may communicate , for example , by infrared or radio frequency signals to convey information back to the computer 10 . turning now to fig7 a computer component 90 is adapted to include a pair of cameras 16 d and 16 e . in the illustrated embodiment , the component 90 is a desk top computer monitor . the cameras 16 d and 16 e are mounted for a reciprocation into and out of the housing of the component 90 so as to extend either above or to the side of the component . in addition , any of the cameras 16 b or 16 c could be used in conjunction with the component 90 . associating the camera with the display screen may be especially advantageous in embodiments using video conferencing . as shown in fig1 , the computer system 10 may include a processor 50 coupled to a bridge 52 , in turn coupled to a system memory 54 . the bridge 52 may connect a bus 56 such as a peripheral component interconnect ( pci ) bus . the bus 56 couples a display controller 58 and a display 60 . the display 60 could be any one of the displays illustrated in fig1 through 7 . an interface 62 may also be coupled to the bus 56 and through the switch 64 to an image processor 76 . the image processor 76 may operate with an imaging array 74 contained , for example , in the component 18 . as mentioned earlier , an image processor 76 may be contained within the housing of the computer 10 or may be provided in the component 18 . the switch 64 , which may be implemented as illustrated in fig9 may be automatically closed when the component 18 is operated to extend out of the computer system housing . the bus 56 may also be coupled to a bridge 66 which is , in turn , coupled to another bus 68 . the bus 68 may support a serial input / output interface ( sio ) 70 which may be coupled , for example , to the keyboard 72 . referring now to fig1 , a radio link 78 may connect the computer system 10 to the camera 16 , for example , when the camera 16 is detached from the computer system 10 . the radio link continues to transmit data back to the computer system 10 through the radio link 78 . the camera 16 may be coupled to a radio 82 by a link controller 80 . the radio 82 transmits a radio frequency signal to a radio 84 connected to the bus 56 by an interface 62 . a variety of conventional radio links may be utilized . one particularly advantageous radio link is the bluetooth radio link ( see www . bluetooth . com ) which uses a short - range , cable replacement , radio technology . the bluetooth radio link uses the 2 . 4 ghz instrumentation , science , medical ( ism ) unlicensed band . the radios 82 , 84 may be set to a nominal range of 10 meters , augmentable with an external power amplifier to up to 100 meters . seventy - nine hop frequencies are utilized beginning at the lowest frequency , which is 2402 mhz , and each of the other hop frequencies is 1 mhz above the next lower frequency . a connection may be made between the two radios 82 , 84 by sending a page message . a page message may include a train of 16 identical page messages on 16 different hop frequencies . the system may use a synchronous connection oriented ( sco ) link for point - to - point , full duplex links , normally used in voice communication . for the application described herein , the asynchronous connectionless link ( acl ) may be used . acl provides one frame duration links with full duplex communications . acl uses a time division duplex scheme . a first slot provides a transmission from the master to the slave and a second slot provides a transmission from the slave to the master . each slot is transmitted on a different hop frequency . the device initializing the transmission is designated the master and the device receiving the transmission is designated the slave . the link controller 80 includes the hardware for performing the baseband processing and the basic protocols close to the physical layer such as the error correction coding and the automatic repeat request ( arq ). arq provides an acknowledgement to the master , in response to a transmission in one slot , in the next following slot which is transmitted from the slave to the master and vice versa . the bluetooth system uses gfsk modulation and a bt - product of 0 . 5 . the data and symbol rate is 1 ms / s at the air interface . while the present invention has been described with respect to a limited number of embodiments , those skilled in the art will appreciate numerous modifications and variations . it is intended that the appended claims cover all such modifications and variations as fall within the true spirit and scope of the present invention .