Abstract: A multi-function attachment for a mobile computer which includes a rotatable and vertically adjustable horizontal arm incorporating a scanner, lighting devices, a camera, a microphone, and retainers for documents. The multi-function attachment for a mobile computer generally includes a multi-function attachment assembly which is slidably and frictionally secured within an inner channel formed within the host device. The attachment assembly includes a horizontal arm rotatably secured to the distal end of a support shaft. The horizontal arm may incorporate a number of devices, such as document retainers, a camera, a microphone, one or more lights and/or a feed slot for scanning documents to the host device.