System, device, method, and computer program and computer program products for providing communicating between devices having similar or dissimilar characteristics and facilitating seamless interoperability between them. Computer program software and methods of and systems and devices for sharing of content, applications, resources and control across similar and dissimilar permanently or intermittently connected electronic devices. Devices, systems, appliances, and the like communicating and/or interoperating within the framework provided. Application driven power management. Applications built using linear tasking and/or vertical layering as embodied at least partially in n interoperability framework, keep track of their exact response time needs so that efficient power management techniques can extend the lifetime of batteries, limit amount of energy consumed, or limit amount of heat generated on devices.