Abstract: A method of generating a calibration factor is described. In an example, the method may include establishing a wireless communication connection with a fitness machine. The method may also include obtaining first machine data from the fitness machine. The first machine data may specify a type of the fitness machine. The method may also include initiating a workout session on the wearable computer based on the first machine data. During the workout session, the method may also include obtaining sensor data, obtaining second machine data, and determining the calibration factor based on the second machine data and the sensor data. The method may also include generating a workout session summary based on the calibration factor.

Abstract: A reusable greeting card may include at least two message sections, each of the message sections configured to provide a medium for the addition of messages. A mechanism, defined on the greeting card, facilitates successive use of the card between two or more parties, such successive use presented in the card in a desired (chronological, non-chronological, random, etc.) sequence. A method of sending greetings includes providing a reusable greeting card having a plurality of designated message sections; and sending the card between two or more parties, each party adding a new message in an unused message section of the card before sending the card on, so that messages are presented in the card in the desired sequence.