Embodiments of the present disclosure provide techniques and configurations for an apparatus for opportunistic measurements and processing of user's context. In one instance, the apparatus may include a sensor module with sensors disposed on a work surface to maintain direct or indirect contact with portions of user's limbs for a time period when the portions of user's limbs are disposed on the work surface, to obtain readings of first and second parameters of user's context over the time period of the direct or indirect contact; and a processing module to process the readings of the first and second parameters, including to identify a first feature of the first parameter and a second feature of the second parameter that is temporally correlated with the first feature, and determine a third parameter of the user's context based on the identified first and second features. Other embodiments may be described and/or claimed.