Abstract: A method of determining a wear of a tire, which may include, using a computing device operating a processor: based on signals from one or more sensors of a vehicle, determining a plurality of tire parameters of a tire; based on at least a portion of the tire parameters, determining a normalized rolling radius of the tire, the normalized rolling radius being an effective rolling radius of the tire under a zero rotational speed, a zero load or both; and based on a change in the normalized rolling radius of the tire over a period of time, determining an average wear value of the tire.

Abstract: A method of creating a user defined function (UDF) in a data processing application program comprising inserting a formula into the application program; assigning a UDF identifier to said formula; and storing said UDF identifier in a complex function generator configured to call said formula responsive to a reference to said UDF identifier in the application program.

Abstract: A system and a method for transparently correcting a transmitted message, which could optionally be an e-mail message for example. Preferably, only the corrected version of the message is displayed to the recipient. Most preferably, the recipient only knows that the message is a corrected version of a previous message according to a notification, which is optionally and most preferably displayed in the context of the corrected message.