Visibility is what operations and manipulation can be performed on a given entity

Social

processes such as turn-taking, conventions etc. help us to work together and

organize our activities

Keeping abreast of what others do and letting others know what you do are irrelevant aspects of collaborative work and socialization

Sense Cam is a wearable tool that takes photographs intermittently when worn without any user interference

Several

systems and technologies were developed to support telepresence and co-presence

One of HCI's goals is to create specific capabilities and constraints for the software and/or hardware and platform chosen for the product

What is the fundamental insight that underlies the evaluation process of "cognitive walk through?"

HCI is about understanding and developing software and other technology that will allow people to use, be able to use, and be successful when used.