Abstract: A digital pen having a body, a sensor to provide an electronic representation of the pen's position on a writing surface, a memory to store data gathered by the sensor and a memory lock whereby unauthorised access to the data may be restricted.

Abstract: This whole farm assurance and actuarial system is a multi-enterprise certification system that undertakes a modular approach, which allows farms to obtain certification for different enterprises without the need for duplication of inspections or administration. This system includes a plurality of assurance procedures separated into modules. A first module of procedures is applicable to farm independent criteria for meeting requirements of a farm regardless of the type of farm. A second module of procedures is applicable to enterprise-specific criteria for meeting requirements of a first enterprise type, and a third module of procedures applicable to enterprise-specific criteria for meeting requirements of a second enterprise type. The farm is required to comply with requirements of the first module before the farm can be certified for either of the second or third modules.