  Since 2007, close binary and multiple stars are observed by speckle
interferometry at the 4.1 m Southern Astrophysical Research (SOAR) telescope.
The HRCam instrument, observing strategy and planning, data processing and
calibration methods, developed and improved during ten years, are presented
here in a concise way. Thousands of binary stars were measured with
diffraction-limited resolution (29mas at 540nm wavelength) and a high accuracy
reaching 1mas; two hundred new pairs or subsystems were discovered. To date,
HRCam has performed over 11000 observations with a high efficiency (up to 300
stars per night). An overview of the main results delivered by this instrument
is given.
