An improved ADPCM encoding and decoding apparatus for compressing and de-compressing a differential signal between an input digital signal and a predicted value of said digitized input in accordance with adaptive differential pulse code modulation is described. The stay-in-place form-work comprises a first elongate panel comprising a first edge component and a second elongate panel comprising a second edge component. Cartridges on the library floor may damage the accessor. The protected zone designator is configured for placement at a location in which the protected zone is desired. The medical data may be transported to a healthcare provider or other endpoints based on the priority value and the authorization of recipient. Thus, the probe can be used regardless of the size of and the distance between the package terminals.