An oil pump has a pump body, an outer rotor, and an inner rotor. In spread trading, an automated spread trading tool may automatically work an order to buy or sell a tradeable object. Contact portions 5c and 5f are provided in the first insertion-detecting contact. Once checked, a shared session from a current user of the checked console device is requested. In a typical embodiment, the migration point total is based on a set of qualitative migration points and a set of quantitative migration points, which are based on various technical aspects of the application, operating system, and hardware involved with the migration process. A filter circuit can provide one or more passbands to one or more downstream amplifiers ensuring that out of band quantization noise is removed before amplification.