This demo is about OSDS, a very powerful tool allowing computer users who cannot use a standard keyboard to replace that with a compact number-pad-like device, the socalled DualPad. The idea is to offer efficient text entry despite the smaller number of keys. The tool basically implements two input methods: One involving the selection of row and column of a character in a two-dimensional virtual keyboard and the other one using an ambiguous keyboard with dictionary-based disambiguation. A special focus is on its applicability to "real-world" use.