Abstract: A server machine is configured to map an identifier of a user to an account of the user within a database. The server machine also embeds the identifier within a uniform resource locator (URL) that, when operated by a browser of the user, causes the browser to interact with a supplier server machine. The server machine later receives interaction result data from the supplier server machine, and the interaction result data includes the identifier of the user and an interaction detail resultant from the interaction initiated by the browser with the supplier server machine. A machine then detects that the interaction detail corresponds to the account of the user based on the identifier being both received in the interaction result data and mapped to the account of the user. Accordingly, the server machine causes inclusion of the interaction detail within an information entry that corresponds to the user.

Abstract: A server machine is configured to map an identifier of a user to an account of the user within a database. The server machine also embeds the identifier within a uniform resource locator (URL) that, when operated by a browser of the user, causes the browser to interact with a supplier server machine. The server machine later receives interaction result data from the supplier server machine, and the interaction result data includes the identifier of the user and an interaction detail resultant from the interaction initiated by the browser with the supplier server machine. A machine then detects that the interaction detail corresponds to the account of the user based on the identifier being both received in the interaction result data and mapped to the account of the user. Accordingly, the server machine causes inclusion of the interaction detail within an information entry that corresponds to the user.

Abstract: A mini electronic calculator adapted to assist children in acquiring the rudiments of arithmetic. The keyboard of the calculator is provided with three parallel sets of keys, the upper set being a row of digit keys for entering a first complete number, and the middle set being a corresponding row of digit keys for entering a second complete number. The lower set includes plus and minus sign function keys and an equal sign key. The calculator display is in a blackboard format and has three parallel groups of LED display stations, the upper group of which is formed by a row of digit stations for presenting the first complete number entered by actuating the keys in the upper keyboard set. The second group is formed by a lead station for presenting a plus or minus sign, depending on which function key is actuted, followed by a row of digit stations for presenting the second complete number entered by actuating the keys in the middle set.