Disclosed is a manual character input device, such as a keyboard or electronic write pad, designed for removable mounting and operation on the front of a bag computer. A keyboard may be ten full size keys wide with thumb keys for missing keys to right and left, may have tactile finger guides and actuating keys adapted for vertical use. The input device attaches by its back or pivotally by one edge. Edge mounts may be a channel, clip, half hinge axle or bearing or clamp and may include a hinge means for non-pivoting bag front mounts. Alignment structures may be included and may form a cover to protect the bag computer/display. Electrical connection to the computer may lead from the input device's back or edge and may be a wire and plug or may be built into the attachments. Alternatively, the input device may have a wireless electrical connection.