The possibility of 
linear colliders has increased significantly during the last
few years in parallel with a series of international workshops called Physics and
Experiments with Linear Colliders.
The International Linear Collider Technical Review Committee(TRC) report [1] exists
concerning the present status of all linear collider projects in the world, together with
related experimentation. This information was presented by Ron Settles in the parallel
session on Experimentation. Critical reviews on machine technologies and the
experimental issues are described in the TRC report. All of the projects are aimed at
producing conceptual designs during the next three years.
Issues on experimentation cover a fairly large area: experimental scenarios, background, detectors, maintenance of stable collisions between nano-meter beams at the interaction point, beam polarization and so on. Eight talks were addressed to the above issues in the session.
In this review, I first present an experimental scenario for the requirements on machine parameters, such as the center-of-mass energies and luminosities from the view point of physics interest. The next section is a consideration on background, which is the most important issue concerning machine interactions. Rather than comparing different approaches for various linear colliders, I concentrate on the case of JLC, [2] as an example of a comprehensive study. A detailed comparison can be found in the TRC report. Very recent R/D on detectors and positron polarization is also summarized. The last issue concerns ground motion and its modeling to provide stable operation of a machine, which was one of the highlights at this workshop. Finally, I summarize the experimentation with future prospects.