A voltage level shifting device for translating a lower operating voltage to a higher operating voltage includes a first input node coupled to a first pull down device and a second input node coupled to a second pull down device. The signal layer includes a differential pair comprising two transmission lines to transmit a pair of differential signal. The ejection port portion is formed such that flow resistance to ink is lower in an area of the ejection port portion which is positioned inward from a center of the ejection port in an ink supply direction of ink flowing along the ink supply channel, than in an area of the ejection port portion which is positioned outward from the center of the ejection port. Accordingly, the present inventors devised systems, methods, and software that generally facilitate identification of one or more documents that are related to a given document, and particularly facilitate identification of prior cases for a given case. The CPA Mobile Address class provides the address retrieval functionality to map the stored mobile address information to a suitable format. Provisions can be made for displaying, reporting, and tracking relevance scores so that appropriate actions can be taken as phishing is detected.