Abstract: Methods and systems are provided that extend the functionality of electro-optical sensors. A device has a multiple light sources, a light detector, and a processor configured to operate the light sources and the light detector to perform distinct functions. At least one of the distinct functions includes a biometric identification function in which light is propagated from the plurality of light sources through presented material. The propagated light is received with the light detector, with the presented material being identified from the received light. Another of the distinct functions includes a nonidentification function performed with the light sources and the light detector.

Abstract: A computer system is configured as a referral-tracking system that responds to receipt of a listing from a recruiter by generating an identifier, associating it with that listing, and giving it to the recruiter. If, before the listing is withdrawn, the system thereafter receives from a requester a message offering to forward the listing and incorporating that identifier or another identifier that the system has associated with that listing, it generates a further identifier as a child of the received identifier, associates that further identifier with the listing and the requester, and sends it to the requester. Consequently, if the listing is fulfilled by someone identified to the system as having received a message that incorporated one of those identifiers, the system determines that identifier's ancestors and thereby compute the chain of referring requesters that led to the listing's being fulfilled. It can also compute an appropriate incentive-award distribution to the referring requesters.

Abstract: A computer system is configured as a referral-tracking system that responds to receipt of a listing from a recruiter by generating an identifier, associating it with that listing, and giving it to the recruiter. If, before the listing is withdrawn, the system thereafter receives from a requester a message offering to forward the listing and incorporating that identifier or another identifier that the system has associated with that listing, it generates a further identifier as a child of the received identifier, associates that further identifier with the listing and the requester, and sends it to the requester. Consequently, if the listing is fulfilled by someone identified to the system as having received a message that incorporated one of those identifiers, the system determines that identifier's ancestors and thereby compute the chain of referring requesters that led to the listing's being fulfilled. It can also compute an appropriate incentive-award distribution to the referring requesters.

Abstract: The invention provides systems and methods that allow retail entities to let consumers register a product or warranty at the point of sale. More specifically, the systems and methods described herein allow a retailer to identify a point during a purchasing transaction wherein the consumer has completed a transaction. At that time, the retailer may presented to the consumer an interface that the consumer may easily complete to allow the consumer to participate in a product or warned she registration process. As such, the systems and methods described here and make the product registration process part of the purchase transaction and therefore make the product registration process seamless and more facile. Consequently it is understood that consumer participation within the product registration process increases.