High Angular Resolution Techniques and Prospects for Multiple Star Studies Author: Y.Y.Balega We present the review of current techniques for high spatial resolution binary and multiple star studies, including speckle interferometry, adaptive optics, Lunar occultations, stellar coronagraphy and precise relative position measurements with the HST Fine Guidance Sensors. The review does not include the long baseline multi aperture interferometry. The comparison of limiting parameters and efficiency for different methods is given: angular resolution, accuracy, magnitude difference between the components, limiting magnitude and others. We give some examples of binary star measurements obtained with different techniques. Depending on the binary star problem, different methods are better suited to meet the criteria. With the combination of two or more different procedures, the most interesting results can be achieved. We also provide an overview of future means for multiple star observations.