Abstract: A method includes identifying property data associated with a plurality of properties. The method further includes identifying user data associated with one or more users. The method further includes determining, based on the property data and the user data, that the one or more users are prequalified for a subset of the plurality of properties. The method further includes causing a graphical representation of the subset of the plurality of properties to be displayed via a user device to the one or more users.

Abstract: A computer-implemented method of gathering data includes defining a list of items to be ranked, identifying a pivot item within the list, collecting data from users providing head-to-head comparisons between other items in the list to be ranked to the pivot item, producing a greater-than-pivot list and a lesser-than-pivot list as next lists, placing the pivot item in a final position in the list, and using the greater-than-pivot list and lesser-than-pivot list separately as the next lists of items to be ranked, repeating the identifying, collecting and placing until all items in the list are in final positions.

Abstract: A method for selecting an advertisement (ad) to display in an ad spot, comprising: accessing a database documenting categories, each including at least one event item having geographical coordinates, an event occurrence time parameter and at least one descriptive parameter; receiving at least one theme definition selected for an advertising campaign; matching between the theme definition and at least one relevant category from the categories; assigning an ad from the advertising campaign to the relevant category according to the matching; receiving a message indicative of a location of a user at a specific time from a client terminal associated with the user; finding an event item corresponding to the location and time; selecting an ad from the relevant category which includes the corresponding event item; and sending the client terminal a response to the message, comprising instructions to present the ad on a display of the client terminal.